38613618 has 32 divisors (see below), whose sum is σ = 86040000. Its totient is φ = 12836448.

The previous prime is 38613599. The next prime is 38613661. The reversal of 38613618 is 81631683.

38613618 is a `hidden beast` number, since 38 + 6 + 1 + 3 + 618 = 666.

It is a super-2 number, since 2×38613618² = 2982022990099848, which contains 22 as substring.

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, 26230 + ... + 27662.

It is an arithmetic number, because the mean of its divisors is an integer number (2688750).

Almost surely, 2^38613618 is an apocalyptic number.

38613618 is an abundant number, since it is smaller than the sum of its proper divisors (47426382).

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

38613618 is a wasteful number, since it uses less digits than its factorization.

38613618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943 (or 1937 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 38613618 is about 6213.9856774859. The cubic root of 38613618 is about 337.9975082388.

The spelling of 38613618 in words is "thirty-eight million, six hundred thirteen thousand, six hundred eighteen".