23231328 has 24 divisors (see below), whose sum is σ = 60982488. Its totient is φ = 7743744.

The previous prime is 23231323. The next prime is 23231339. The reversal of 23231328 is 82313232.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 23231298 and 23231307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120901 + ... + 121092.

It is an arithmetic number, because the mean of its divisors is an integer number (2540937).

Almost surely, 2^23231328 is an apocalyptic number.

It is an amenable number.

23231328 is an abundant number, since it is smaller than the sum of its proper divisors (37751160).

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

23231328 is a wasteful number, since it uses less digits than its factorization.

23231328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242006 (or 241998 counting only the distinct ones).

The product of its digits is 1728, while the sum is 24.

The square root of 23231328 is about 4819.8887953977. Note that the first 3 decimals coincide. The cubic root of 23231328 is about 285.3369483534.

The spelling of 23231328 in words is "twenty-three million, two hundred thirty-one thousand, three hundred twenty-eight".