7990407 has 20 divisors (see below), whose sum is σ = 12458160. Its totient is φ = 5094144.

The previous prime is 7990379. The next prime is 7990427. The reversal of 7990407 is 7040997.

It is a de Polignac number, because none of the positive numbers 2^k-7990407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990427) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 282 + ... + 4007.

It is an arithmetic number, because the mean of its divisors is an integer number (622908).

Almost surely, 2^7990407 is an apocalyptic number.

7990407 is a deficient number, since it is larger than the sum of its proper divisors (4467753).

7990407 is a wasteful number, since it uses less digits than its factorization.

7990407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4324 (or 4315 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 7990407 is about 2826.7307972285. The cubic root of 7990407 is about 199.9200263587.

The spelling of 7990407 in words is "seven million, nine hundred ninety thousand, four hundred seven".