75990856 has 8 divisors (see below), whose sum is σ = 142482870. Its totient is φ = 37995424.

The previous prime is 75990851. The next prime is 75990857. The reversal of 75990856 is 65809957.

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 28793956 = 6870^2 + 5366^2 .

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

It is a super-2 number, since 2×75990856² = 11549220391225472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (75990851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4749421 + ... + 4749436.

Almost surely, 2^75990856 is an apocalyptic number.

It is an amenable number.

75990856 is a deficient number, since it is larger than the sum of its proper divisors (66492014).

75990856 is a wasteful number, since it uses less digits than its factorization.

75990856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9498863 (or 9498859 counting only the distinct ones).

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 75990856 is about 8717.2734269380. The cubic root of 75990856 is about 423.5653698622.

The spelling of 75990856 in words is "seventy-five million, nine hundred ninety thousand, eight hundred fifty-six".