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1440123234 = 231143211801
BaseRepresentation
bin101010111010110…
…1000100101100010
310201100211211200120
41111311220211202
510422132420414
6354522501110
750454563004
oct12565504542
93640754616
101440123234
11679a039a0
12342364796
1319c489434
14d9398374
158666d2a9
hex55d68962

1440123234 has 48 divisors (see below), whose sum is σ = 3217130784. Its totient is φ = 426216000.

The previous prime is 1440123211. The next prime is 1440123239. The reversal of 1440123234 is 4323210441.

It is not an unprimeable number, because it can be changed into a prime (1440123239) 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, 116134 + ... + 127934.

It is an arithmetic number, because the mean of its divisors is an integer number (67023558).

Almost surely, 21440123234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1440123234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1608565392).

1440123234 is an abundant number, since it is smaller than the sum of its proper divisors (1777007550).

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

1440123234 is a wasteful number, since it uses less digits than its factorization.

1440123234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11903 (or 11860 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1440123234 is about 37948.9556378038. The cubic root of 1440123234 is about 1129.2754469700.

Adding to 1440123234 its reverse (4323210441), we get a palindrome (5763333675).

The spelling of 1440123234 in words is "one billion, four hundred forty million, one hundred twenty-three thousand, two hundred thirty-four".

Divisors: 1 2 3 6 11 22 33 43 66 86 129 258 473 946 1419 1849 2838 3698 5547 11094 11801 20339 23602 35403 40678 61017 70806 122034 129811 259622 389433 507443 778866 1014886 1522329 3044658 5581873 11163746 16745619 21820049 33491238 43640098 65460147 130920294 240020539 480041078 720061617 1440123234