218915364 has 24 divisors (see below), whose sum is σ = 511051968. Its totient is φ = 72936160.

The previous prime is 218915363. The next prime is 218915377. The reversal of 218915364 is 463519812.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218915363) 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, 35434 + ... + 41150.

It is an arithmetic number, because the mean of its divisors is an integer number (21293832).

Almost surely, 2^218915364 is an apocalyptic number.

It is an amenable number.

218915364 is an abundant number, since it is smaller than the sum of its proper divisors (292136604).

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

218915364 is a wasteful number, since it uses less digits than its factorization.

218915364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915 (or 8913 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 218915364 is about 14795.7887251745. The cubic root of 218915364 is about 602.6873566645.

The spelling of 218915364 in words is "two hundred eighteen million, nine hundred fifteen thousand, three hundred sixty-four".