7990431 has 16 divisors (see below), whose sum is σ = 11331840. Its totient is φ = 4993920.

The previous prime is 7990427. The next prime is 7990441. The reversal of 7990431 is 1340997.

It is not a de Polignac number, because 7990431 - 2² = 7990427 is a prime.

It is a super-2 number, since 2×7990431² = 127693975131522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7990392 and 7990401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5191 + ... + 6551.

It is an arithmetic number, because the mean of its divisors is an integer number (708240).

Almost surely, 2^7990431 is an apocalyptic number.

7990431 is a deficient number, since it is larger than the sum of its proper divisors (3341409).

7990431 is a wasteful number, since it uses less digits than its factorization.

7990431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 7990431 is about 2826.7350424120. The cubic root of 7990431 is about 199.9202265185.

The spelling of 7990431 in words is "seven million, nine hundred ninety thousand, four hundred thirty-one".