978815196 has 18 divisors (see below), whose sum is σ = 2474227392. Its totient is φ = 326271720.

The previous prime is 978815129. The next prime is 978815207. The reversal of 978815196 is 691518879.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13594620 + ... + 13594691.

Almost surely, 2^978815196 is an apocalyptic number.

It is an amenable number.

978815196 is an abundant number, since it is smaller than the sum of its proper divisors (1495412196).

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

978815196 is a wasteful number, since it uses less digits than its factorization.

978815196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27189321 (or 27189316 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 54.

The square root of 978815196 is about 31286.0223742169. The cubic root of 978815196 is about 992.8879371414.

The spelling of 978815196 in words is "nine hundred seventy-eight million, eight hundred fifteen thousand, one hundred ninety-six".