978476940 has 72 divisors (see below), whose sum is σ = 3392057760. Its totient is φ = 223651584.

The previous prime is 978476929. The next prime is 978476959. The reversal of 978476940 is 49674879.

It is a happy number.

It is a super-2 number, since 2×978476940² = 1914834244223527200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 387025 + ... + 389544.

Almost surely, 2^978476940 is an apocalyptic number.

978476940 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

978476940 is an abundant number, since it is smaller than the sum of its proper divisors (2413580820).

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

978476940 is a wasteful number, since it uses less digits than its factorization.

978476940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776591 (or 776586 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The square root of 978476940 is about 31280.6160425270. The cubic root of 978476940 is about 992.7735508921.

The spelling of 978476940 in words is "nine hundred seventy-eight million, four hundred seventy-six thousand, nine hundred forty".