23978554 has 16 divisors (see below), whose sum is σ = 37209600. Its totient is φ = 11582064.

The previous prime is 23978543. The next prime is 23978557. The reversal of 23978554 is 45587932.

It is a self number, because there is not a number n which added to its sum of digits gives 23978554.

It is not an unprimeable number, because it can be changed into a prime (23978557) 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, 5812 + ... + 9040.

It is an arithmetic number, because the mean of its divisors is an integer number (2325600).

Almost surely, 2^23978554 is an apocalyptic number.

23978554 is a deficient number, since it is larger than the sum of its proper divisors (13231046).

23978554 is a wasteful number, since it uses less digits than its factorization.

23978554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3357.

The product of its digits is 302400, while the sum is 43.

The square root of 23978554 is about 4896.7901731645. The cubic root of 23978554 is about 288.3639704452.

The spelling of 23978554 in words is "twenty-three million, nine hundred seventy-eight thousand, five hundred fifty-four".