7978996 has 12 divisors (see below), whose sum is σ = 14010052. Its totient is φ = 3976128.

The previous prime is 7978981. The next prime is 7979009. The reversal of 7978996 is 6998797.

It can be written as a sum of positive squares in 2 ways, for example, as 2624400 + 5354596 = 1620^2 + 2314^2 .

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935 + ... + 4438.

Almost surely, 2^7978996 is an apocalyptic number.

It is an amenable number.

7978996 is a deficient number, since it is larger than the sum of its proper divisors (6031056).

7978996 is a wasteful number, since it uses less digits than its factorization.

7978996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6690 (or 6688 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 55.

The square root of 7978996 is about 2824.7116667016. The cubic root of 7978996 is about 199.8248132595.

The spelling of 7978996 in words is "seven million, nine hundred seventy-eight thousand, nine hundred ninety-six".