7990856 has 8 divisors (see below), whose sum is σ = 14982870. Its totient is φ = 3995424.

The previous prime is 7990847. The next prime is 7990877. The reversal of 7990856 is 6580997.

It can be written as a sum of positive squares in only one way, i.e., 5134756 + 2856100 = 2266^2 + 1690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×7990856² = 127707559225472, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 499421 + ... + 499436.

Almost surely, 2^7990856 is an apocalyptic number.

It is an amenable number.

7990856 is a deficient number, since it is larger than the sum of its proper divisors (6992014).

7990856 is a wasteful number, since it uses less digits than its factorization.

7990856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998863 (or 998859 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 7990856 is about 2826.8102164808. The cubic root of 7990856 is about 199.9237709494.

The spelling of 7990856 in words is "seven million, nine hundred ninety thousand, eight hundred fifty-six".