7990690 has 16 divisors (see below), whose sum is σ = 14718528. Its totient is φ = 3121776.

The previous prime is 7990673. The next prime is 7990709. The reversal of 7990690 is 960997.

It is a super-2 number, since 2×7990690² = 127702253352200, which contains 22 as substring.

It is an Ulam 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, 8862 + ... + 9721.

It is an arithmetic number, because the mean of its divisors is an integer number (919908).

Almost surely, 2^7990690 is an apocalyptic number.

7990690 is a deficient number, since it is larger than the sum of its proper divisors (6727838).

7990690 is a wasteful number, since it uses less digits than its factorization.

7990690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18633.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 7990690 is about 2826.7808546118. The cubic root of 7990690 is about 199.9223865513.

The spelling of 7990690 in words is "seven million, nine hundred ninety thousand, six hundred ninety".