23640480 has 72 divisors (see below), whose sum is σ = 80678052. Its totient is φ = 6303744.

The previous prime is 23640479. The next prime is 23640493. The reversal of 23640480 is 8404632.

It can be written as a sum of positive squares in 2 ways, for example, as 22695696 + 944784 = 4764^2 + 972^2 .

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

It is an unprimeable number.

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, 6769 + ... + 9648.

Almost surely, 2^23640480 is an apocalyptic number.

23640480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23640480 is an abundant number, since it is smaller than the sum of its proper divisors (57037572).

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

23640480 is a wasteful number, since it uses less digits than its factorization.

23640480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16438 (or 16427 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 23640480 is about 4862.1476736109. The cubic root of 23640480 is about 287.0023350019.

The spelling of 23640480 in words is "twenty-three million, six hundred forty thousand, four hundred eighty".