23400320 has 32 divisors (see below), whose sum is σ = 55942920. Its totient is φ = 9359872.

The previous prime is 23400259. The next prime is 23400331. The reversal of 23400320 is 2300432.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×23400320² = 1095149952204800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23400295 and 23400304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17642 + ... + 18921.

Almost surely, 2^23400320 is an apocalyptic number.

23400320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23400320 is an abundant number, since it is smaller than the sum of its proper divisors (32542600).

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

23400320 is an equidigital number, since it uses as much as digits as its factorization.

23400320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36582 (or 36570 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 14.

The square root of 23400320 is about 4837.3877247953. The cubic root of 23400320 is about 286.0271544139.

Adding to 23400320 its reverse (2300432), we get a palindrome (25700752).

The spelling of 23400320 in words is "twenty-three million, four hundred thousand, three hundred twenty".