23685540 has 24 divisors (see below), whose sum is σ = 66319680. Its totient is φ = 6316128.

The previous prime is 23685527. The next prime is 23685551. The reversal of 23685540 is 4558632.

It is a super-2 number, since 2×23685540² = 1122009610183200, 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, 197320 + ... + 197439.

It is an arithmetic number, because the mean of its divisors is an integer number (2763320).

Almost surely, 2^23685540 is an apocalyptic number.

23685540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23685540 is an abundant number, since it is smaller than the sum of its proper divisors (42634140).

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

23685540 is a wasteful number, since it uses less digits than its factorization.

23685540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394771 (or 394769 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 23685540 is about 4866.7792224427. The cubic root of 23685540 is about 287.1845664588.

The spelling of 23685540 in words is "twenty-three million, six hundred eighty-five thousand, five hundred forty".