7990686 has 24 divisors (see below), whose sum is σ = 18887544. Its totient is φ = 2421360.

The previous prime is 7990673. The next prime is 7990709. The reversal of 7990686 is 6860997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19981 + ... + 20376.

It is an arithmetic number, because the mean of its divisors is an integer number (786981).

Almost surely, 2^7990686 is an apocalyptic number.

7990686 is an abundant number, since it is smaller than the sum of its proper divisors (10896858).

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

7990686 is a wasteful number, since it uses less digits than its factorization.

7990686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40376 (or 40373 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 7990686 is about 2826.7801470932. The cubic root of 7990686 is about 199.9223531921.

The spelling of 7990686 in words is "seven million, nine hundred ninety thousand, six hundred eighty-six".