23993538 has 16 divisors (see below), whose sum is σ = 49284480. Its totient is φ = 7781616.

The previous prime is 23993537. The next prime is 23993539. The reversal of 23993538 is 83539932.

It is an interprime number because it is at equal distance from previous prime (23993537) and next prime (23993539).

It is a self number, because there is not a number n which added to its sum of digits gives 23993538.

It is not an unprimeable number, because it can be changed into a prime (23993533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53818 + ... + 54261.

It is an arithmetic number, because the mean of its divisors is an integer number (3080280).

Almost surely, 2^23993538 is an apocalyptic number.

23993538 is an abundant number, since it is smaller than the sum of its proper divisors (25290942).

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

23993538 is a wasteful number, since it uses less digits than its factorization.

23993538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108121.

The product of its digits is 174960, while the sum is 42.

The square root of 23993538 is about 4898.3199160529. The cubic root of 23993538 is about 288.4240233579.

It can be divided in two parts, 23993 and 538, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 23993538 in words is "twenty-three million, nine hundred ninety-three thousand, five hundred thirty-eight".