7978956 has 24 divisors (see below), whose sum is σ = 18844224. Its totient is φ = 2627280.

The previous prime is 7978937. The next prime is 7978961. The reversal of 7978956 is 6598797.

It is a junction number, because it is equal to n+sod(n) for n = 7978899 and 7978908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010 + ... + 5001.

It is an arithmetic number, because the mean of its divisors is an integer number (785176).

Almost surely, 2^7978956 is an apocalyptic number.

7978956 is the 1787-th centered pentagonal number.

It is an amenable number.

7978956 is an abundant number, since it is smaller than the sum of its proper divisors (10865268).

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

7978956 is a wasteful number, since it uses less digits than its factorization.

7978956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101 (or 8099 counting only the distinct ones).

The product of its digits is 952560, while the sum is 51.

The square root of 7978956 is about 2824.7045863240. The cubic root of 7978956 is about 199.8244793409.

The spelling of 7978956 in words is "seven million, nine hundred seventy-eight thousand, nine hundred fifty-six".