47218464 has 60 divisors (see below), whose sum is σ = 138875814. Its totient is φ = 15738624.

The previous prime is 47218463. The next prime is 47218489. The reversal of 47218464 is 46481274.

47218464 is a `hidden beast` number, since 472 + 184 + 6 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44355600 + 2862864 = 6660^2 + 1692^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (47218463) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 6517 + ... + 11700.

Almost surely, 2^47218464 is an apocalyptic number.

It is an amenable number.

47218464 is an abundant number, since it is smaller than the sum of its proper divisors (91657350).

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

47218464 is a wasteful number, since it uses less digits than its factorization.

47218464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18239 (or 18222 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 47218464 is about 6871.5692530891. The cubic root of 47218464 is about 361.4408918355.

The spelling of 47218464 in words is "forty-seven million, two hundred eighteen thousand, four hundred sixty-four".