23157732 has 72 divisors (see below), whose sum is σ = 61692960. Its totient is φ = 6739200.

The previous prime is 23157727. The next prime is 23157749. The reversal of 23157732 is 23775132.

23157732 is nontrivially palindromic in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 23157732.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 38232 + ... + 38832.

Almost surely, 2^23157732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23157732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30846480).

23157732 is an abundant number, since it is smaller than the sum of its proper divisors (38535228).

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

23157732 is a wasteful number, since it uses less digits than its factorization.

23157732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 638 counting only the distinct ones).

The product of its digits is 8820, while the sum is 30.

The square root of 23157732 is about 4812.2481232788. The cubic root of 23157732 is about 285.0353172607.

The spelling of 23157732 in words is "twenty-three million, one hundred fifty-seven thousand, seven hundred thirty-two".