23312400 has 60 divisors (see below), whose sum is σ = 74681232. Its totient is φ = 6216320.

The previous prime is 23312351. The next prime is 23312441. The reversal of 23312400 is 421332.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 23312400.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8514 + ... + 10913.

Almost surely, 2^23312400 is an apocalyptic number.

23312400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23312400 is an abundant number, since it is smaller than the sum of its proper divisors (51368832).

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

23312400 is a wasteful number, since it uses less digits than its factorization.

23312400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19448 (or 19437 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 23312400 is about 4828.2916233384. The cubic root of 23312400 is about 285.6684831340.

Adding to 23312400 its reverse (421332), we get a palindrome (23733732).

The spelling of 23312400 in words is "twenty-three million, three hundred twelve thousand, four hundred".