23431328 has 12 divisors (see below), whose sum is σ = 46130490. Its totient is φ = 11715648.

The previous prime is 23431327. The next prime is 23431357. The reversal of 23431328 is 82313432.

It can be written as a sum of positive squares in only one way, i.e., 22771984 + 659344 = 4772^2 + 812^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23431297 and 23431306.

It is not an unprimeable number, because it can be changed into a prime (23431327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 366083 + ... + 366146.

Almost surely, 2^23431328 is an apocalyptic number.

It is an amenable number.

23431328 is a deficient number, since it is larger than the sum of its proper divisors (22699162).

23431328 is an equidigital number, since it uses as much as digits as its factorization.

23431328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732239 (or 732231 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

The square root of 23431328 is about 4840.5916993690. The cubic root of 23431328 is about 286.1534378061.

The spelling of 23431328 in words is "twenty-three million, four hundred thirty-one thousand, three hundred twenty-eight".