23129756 has 12 divisors (see below), whose sum is σ = 43590792. Its totient is φ = 10675248.

The previous prime is 23129723. The next prime is 23129759. The reversal of 23129756 is 65792132.

It is a super-2 number, since 2×23129756² = 1069971225239072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23129759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222350 + ... + 222453.

It is an arithmetic number, because the mean of its divisors is an integer number (3632566).

Almost surely, 2^23129756 is an apocalyptic number.

23129756 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

23129756 is a deficient number, since it is larger than the sum of its proper divisors (20461036).

23129756 is a wasteful number, since it uses less digits than its factorization.

23129756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444820 (or 444818 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 23129756 is about 4809.3404953278. The cubic root of 23129756 is about 284.9204907990.

The spelling of 23129756 in words is "twenty-three million, one hundred twenty-nine thousand, seven hundred fifty-six".