7990345 has 16 divisors (see below), whose sum is σ = 10549440. Its totient is φ = 5761600.

The previous prime is 7990337. The next prime is 7990349. The reversal of 7990345 is 5430997.

It is not a de Polignac number, because 7990345 - 2³ = 7990337 is a prime.

It is a super-2 number, since 2×7990345² = 127691226438050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7990349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6651 + ... + 7759.

It is an arithmetic number, because the mean of its divisors is an integer number (659340).

Almost surely, 2^7990345 is an apocalyptic number.

It is an amenable number.

7990345 is a deficient number, since it is larger than the sum of its proper divisors (2559095).

7990345 is a wasteful number, since it uses less digits than its factorization.

7990345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 7990345 is about 2826.7198304749. The cubic root of 7990345 is about 199.9195092772.

The spelling of 7990345 in words is "seven million, nine hundred ninety thousand, three hundred forty-five".