38621618 has 16 divisors (see below), whose sum is σ = 66315840. Its totient is φ = 16525296.

The previous prime is 38621587. The next prime is 38621641. The reversal of 38621618 is 81612683.

It is a Curzon number.

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, 8480 + ... + 12212.

It is an arithmetic number, because the mean of its divisors is an integer number (4144740).

Almost surely, 2^38621618 is an apocalyptic number.

38621618 is a deficient number, since it is larger than the sum of its proper divisors (27694222).

38621618 is a wasteful number, since it uses less digits than its factorization.

38621618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481.

The product of its digits is 13824, while the sum is 35.

The square root of 38621618 is about 6214.6293533887. The cubic root of 38621618 is about 338.0208488242.

The spelling of 38621618 in words is "thirty-eight million, six hundred twenty-one thousand, six hundred eighteen".