47644618 has 16 divisors (see below), whose sum is σ = 82797120. Its totient is φ = 20138976.

The previous prime is 47644603. The next prime is 47644657. The reversal of 47644618 is 81644674.

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, 22288 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (5174820).

Almost surely, 2^47644618 is an apocalyptic number.

47644618 is a deficient number, since it is larger than the sum of its proper divisors (35152502).

47644618 is a wasteful number, since it uses less digits than its factorization.

47644618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46701.

The product of its digits is 129024, while the sum is 40.

The square root of 47644618 is about 6902.5080948884. The cubic root of 47644618 is about 362.5249904293.

The spelling of 47644618 in words is "forty-seven million, six hundred forty-four thousand, six hundred eighteen".