7978916 has 24 divisors (see below), whose sum is σ = 16130016. Its totient is φ = 3413120.

The previous prime is 7978913. The next prime is 7978937. The reversal of 7978916 is 6198797.

It is not an unprimeable number, because it can be changed into a prime (7978913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4586 + ... + 6081.

It is an arithmetic number, because the mean of its divisors is an integer number (672084).

Almost surely, 2^7978916 is an apocalyptic number.

It is an amenable number.

7978916 is an abundant number, since it is smaller than the sum of its proper divisors (8151100).

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

7978916 is a wasteful number, since it uses less digits than its factorization.

7978916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10699 (or 10697 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 7978916 is about 2824.6975059287. The cubic root of 7978916 is about 199.8241454212.

The spelling of 7978916 in words is "seven million, nine hundred seventy-eight thousand, nine hundred sixteen".