23978442 has 16 divisors (see below), whose sum is σ = 49253472. Its totient is φ = 7776720.

The previous prime is 23978417. The next prime is 23978459. The reversal of 23978442 is 24487932.

It is a self number, because there is not a number n which added to its sum of digits gives 23978442.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53784 + ... + 54227.

It is an arithmetic number, because the mean of its divisors is an integer number (3078342).

Almost surely, 2^23978442 is an apocalyptic number.

23978442 is an abundant number, since it is smaller than the sum of its proper divisors (25275030).

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

23978442 is a wasteful number, since it uses less digits than its factorization.

23978442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108053.

The product of its digits is 96768, while the sum is 39.

The square root of 23978442 is about 4896.7787370883. The cubic root of 23978442 is about 288.3635214772.

The spelling of 23978442 in words is "twenty-three million, nine hundred seventy-eight thousand, four hundred forty-two".