23978685 has 16 divisors (see below), whose sum is σ = 38465280. Its totient is φ = 12755520.

The previous prime is 23978677. The next prime is 23978707. The reversal of 23978685 is 58687932.

23978685 = T₉₄ + T₉₅ + ... + T₅₂₄.

It is not a de Polignac number, because 23978685 - 2³ = 23978677 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4611 + ... + 8319.

It is an arithmetic number, because the mean of its divisors is an integer number (2404080).

Almost surely, 2^23978685 is an apocalyptic number.

It is an amenable number.

23978685 is a deficient number, since it is larger than the sum of its proper divisors (14486595).

23978685 is a wasteful number, since it uses less digits than its factorization.

23978685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4148.

The product of its digits is 725760, while the sum is 48.

The square root of 23978685 is about 4896.8035492554. The cubic root of 23978685 is about 288.3644955757.

The spelling of 23978685 in words is "twenty-three million, nine hundred seventy-eight thousand, six hundred eighty-five".