23686690 has 16 divisors (see below), whose sum is σ = 42695928. Its totient is φ = 9461376.

The previous prime is 23686687. The next prime is 23686703. The reversal of 23686690 is 9668632.

It can be written as a sum of positive squares in 4 ways, for example, as 21967969 + 1718721 = 4687^2 + 1311^2 .

It is a super-2 number, since 2×23686690² = 1122118566312200, which contains 22 as substring.

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, 9184 + ... + 11476.

Almost surely, 2^23686690 is an apocalyptic number.

23686690 is a deficient number, since it is larger than the sum of its proper divisors (19009238).

23686690 is a wasteful number, since it uses less digits than its factorization.

23686690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3333.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 23686690 is about 4866.8973689611. The cubic root of 23686690 is about 287.1892142581.

The spelling of 23686690 in words is "twenty-three million, six hundred eighty-six thousand, six hundred ninety".