23404320 has 72 divisors (see below), whose sum is σ = 79872156. Its totient is φ = 6240768.

The previous prime is 23404319. The next prime is 23404327. The reversal of 23404320 is 2340432.

23404320 is a `hidden beast` number, since 2 + 340 + 4 + 320 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 23386896 + 17424 = 4836^2 + 132^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 23404293 and 23404302.

It is not an unprimeable number, because it can be changed into a prime (23404327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6687 + ... + 9566.

Almost surely, 2^23404320 is an apocalyptic number.

23404320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23404320 is an abundant number, since it is smaller than the sum of its proper divisors (56467836).

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

23404320 is a wasteful number, since it uses less digits than its factorization.

23404320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16274 (or 16263 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 23404320 is about 4837.8011534167. The cubic root of 23404320 is about 286.0434511061.

Adding to 23404320 its reverse (2340432), we get a palindrome (25744752).

The spelling of 23404320 in words is "twenty-three million, four hundred four thousand, three hundred twenty".