478978884 has 18 divisors (see below), whose sum is σ = 1210752270. Its totient is φ = 159659616.

The previous prime is 478978873. The next prime is 478978889. The reversal of 478978884 is 488879874.

478978884 is a `hidden beast` number, since 478 + 9 + 7 + 88 + 84 = 666.

It can be written as a sum of positive squares in only one way, i.e., 426009600 + 52969284 = 20640^2 + 7278^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×478978884³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (478978889) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6652449 + ... + 6652520.

It is an arithmetic number, because the mean of its divisors is an integer number (67264015).

Almost surely, 2^478978884 is an apocalyptic number.

It is an amenable number.

478978884 is an abundant number, since it is smaller than the sum of its proper divisors (731773386).

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

478978884 is a wasteful number, since it uses less digits than its factorization.

478978884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13304979 (or 13304974 counting only the distinct ones).

The product of its digits is 28901376, while the sum is 63.

The square root of 478978884 is about 21885.5862155895. The cubic root of 478978884 is about 782.4179210080.

The spelling of 478978884 in words is "four hundred seventy-eight million, nine hundred seventy-eight thousand, eight hundred eighty-four".