47578664 has 32 divisors (see below), whose sum is σ = 104129280. Its totient is φ = 19955904.

The previous prime is 47578649. The next prime is 47578669. The reversal of 47578664 is 46687574.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is not an unprimeable number, because it can be changed into a prime (47578669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6407 + ... + 11670.

It is an arithmetic number, because the mean of its divisors is an integer number (3254040).

Almost surely, 2^47578664 is an apocalyptic number.

It is an amenable number.

47578664 is an abundant number, since it is smaller than the sum of its proper divisors (56550616).

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

47578664 is a wasteful number, since it uses less digits than its factorization.

47578664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18137 (or 18133 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 47.

The square root of 47578664 is about 6897.7289016023. The cubic root of 47578664 is about 362.3576331950.

The spelling of 47578664 in words is "forty-seven million, five hundred seventy-eight thousand, six hundred sixty-four".