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40031250 = 2356761
BaseRepresentation
bin1001100010110…
…1010000010010
32210022210112220
42120231100102
540222000000
63550001510
7664155120
oct230552022
983283486
1040031250
1120662086
12114a6296
1383a7b3c
145460910
1537ab1a0
hex262d412

40031250 has 112 divisors (see below), whose sum is σ = 116248512. Its totient is φ = 9000000.

The previous prime is 40031239. The next prime is 40031269. The reversal of 40031250 is 5213004.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 656220 + ... + 656280.

Almost surely, 240031250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40031250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58124256).

40031250 is an abundant number, since it is smaller than the sum of its proper divisors (76217262).

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

40031250 is an frugal number, since it uses more digits than its factorization.

40031250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 40031250 is about 6327.0253674219. The cubic root of 40031250 is about 342.0842273996.

Adding to 40031250 its reverse (5213004), we get a palindrome (45244254).

It can be divided in two parts, 4003 and 1250, that added together give a triangular number (5253 = T102).

The spelling of 40031250 in words is "forty million, thirty-one thousand, two hundred fifty".

Divisors: 1 2 3 5 6 7 10 14 15 21 25 30 35 42 50 61 70 75 105 122 125 150 175 183 210 250 305 350 366 375 427 525 610 625 750 854 875 915 1050 1250 1281 1525 1750 1830 1875 2135 2562 2625 3050 3125 3750 4270 4375 4575 5250 6250 6405 7625 8750 9150 9375 10675 12810 13125 15250 15625 18750 21350 21875 22875 26250 31250 32025 38125 43750 45750 46875 53375 64050 65625 76250 93750 106750 109375 114375 131250 160125 190625 218750 228750 266875 320250 328125 381250 533750 571875 656250 800625 953125 1143750 1334375 1601250 1906250 2668750 2859375 4003125 5718750 6671875 8006250 13343750 20015625 40031250