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13143240 = 23325113319
BaseRepresentation
bin110010001000…
…110011001000
3220201202010200
4302020303020
511331040430
61145412200
7216500325
oct62106310
926652120
1013143240
117467790
12449a060
132952486
141a61b4c
151249460
hexc88cc8

13143240 has 96 divisors (see below), whose sum is σ = 46612800. Its totient is φ = 3185280.

The previous prime is 13143239. The next prime is 13143241. The reversal of 13143240 is 4234131.

It is an interprime number because it is at equal distance from previous prime (13143239) and next prime (13143241).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13143241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2301 + ... + 5619.

It is an arithmetic number, because the mean of its divisors is an integer number (485550).

Almost surely, 213143240 is an apocalyptic number.

13143240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13143240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23306400).

13143240 is an abundant number, since it is smaller than the sum of its proper divisors (33469560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13143240 is a wasteful number, since it uses less digits than its factorization.

13143240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3347 (or 3340 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13143240 is about 3625.3606717125. The cubic root of 13143240 is about 235.9939192152.

Adding to 13143240 its reverse (4234131), we get a palindrome (17377371).

It can be divided in two parts, 1314 and 3240, that added together give a palindrome (4554).

The spelling of 13143240 in words is "thirteen million, one hundred forty-three thousand, two hundred forty".

Divisors: 1 2 3 4 5 6 8 9 10 11 12 15 18 20 22 24 30 33 36 40 44 45 55 60 66 72 88 90 99 110 120 132 165 180 198 220 264 330 360 396 440 495 660 792 990 1320 1980 3319 3960 6638 9957 13276 16595 19914 26552 29871 33190 36509 39828 49785 59742 66380 73018 79656 99570 109527 119484 132760 146036 149355 182545 199140 219054 238968 292072 298710 328581 365090 398280 438108 547635 597420 657162 730180 876216 1095270 1194840 1314324 1460360 1642905 2190540 2628648 3285810 4381080 6571620 13143240