23157504 has 162 divisors, whose sum is σ = 73471580. Its totient is φ = 6994944.

The previous prime is 23157503. The next prime is 23157509. The reversal of 23157504 is 40575132.

It is a happy number.

23157504 is a `hidden beast` number, since 2 + 3 + 157 + 504 = 666.

It is not an unprimeable number, because it can be changed into a prime (23157503) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1006837 + ... + 1006859.

Almost surely, 2^23157504 is an apocalyptic number.

23157504 is a gapful number since it is divisible by the number (24) 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 23157504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36735790).

23157504 is an abundant number, since it is smaller than the sum of its proper divisors (50314076).

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

23157504 is a wasteful number, since it uses less digits than its factorization.

23157504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 47 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 23157504 is about 4812.2244336689. The cubic root of 23157504 is about 285.0343818170.

The spelling of 23157504 in words is "twenty-three million, one hundred fifty-seven thousand, five hundred four".