904971978 has 24 divisors (see below), whose sum is σ = 1961352900. Its totient is φ = 301568064.

The previous prime is 904971959. The next prime is 904971989. The reversal of 904971978 is 879179409.

It can be written as a sum of positive squares in 2 ways, for example, as 874798929 + 30173049 = 29577^2 + 5493^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88558 + ... + 98246.

Almost surely, 2^904971978 is an apocalyptic number.

904971978 is an abundant number, since it is smaller than the sum of its proper divisors (1056380922).

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

904971978 is a wasteful number, since it uses less digits than its factorization.

904971978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14886 (or 14883 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 904971978 is about 30082.7521679782. The cubic root of 904971978 is about 967.2640435747.

The spelling of 904971978 in words is "nine hundred four million, nine hundred seventy-one thousand, nine hundred seventy-eight".