478978218 has 32 divisors (see below), whose sum is σ = 1066158720. Its totient is φ = 159395040.

The previous prime is 478978217. The next prime is 478978223. The reversal of 478978218 is 812879874.

It is a happy number.

478978218 is a `hidden beast` number, since 478 + 97 + 82 + 1 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (478978217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27046 + ... + 41102.

It is an arithmetic number, because the mean of its divisors is an integer number (33317460).

Almost surely, 2^478978218 is an apocalyptic number.

478978218 is an abundant number, since it is smaller than the sum of its proper divisors (587180502).

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

478978218 is a wasteful number, since it uses less digits than its factorization.

478978218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14699 (or 14693 counting only the distinct ones).

The product of its digits is 1806336, while the sum is 54.

The square root of 478978218 is about 21885.5710000904. The cubic root of 478978218 is about 782.4175583680.

The spelling of 478978218 in words is "four hundred seventy-eight million, nine hundred seventy-eight thousand, two hundred eighteen".