978790636 has 12 divisors (see below), whose sum is σ = 1713121200. Its totient is φ = 489327440.

The previous prime is 978790627. The next prime is 978790649. The reversal of 978790636 is 636097879.

It is a super-2 number, since 2×978790636² = 1916062218242568992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29790 + ... + 53338.

It is an arithmetic number, because the mean of its divisors is an integer number (142760100).

Almost surely, 2^978790636 is an apocalyptic number.

It is an amenable number.

978790636 is a deficient number, since it is larger than the sum of its proper divisors (734330564).

978790636 is a wasteful number, since it uses less digits than its factorization.

978790636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33944 (or 33942 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 55.

The square root of 978790636 is about 31285.6298642044. The cubic root of 978790636 is about 992.8796327029.

The spelling of 978790636 in words is "nine hundred seventy-eight million, seven hundred ninety thousand, six hundred thirty-six".