805879988 has 12 divisors (see below), whose sum is σ = 1411146660. Its totient is φ = 402695232.

The previous prime is 805879981. The next prime is 805880011. The reversal of 805879988 is 889978508.

It can be written as a sum of positive squares in 2 ways, for example, as 428821264 + 377058724 = 20708^2 + 19418^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 805879988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (805879981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53681 + ... + 67032.

It is an arithmetic number, because the mean of its divisors is an integer number (117595555).

Almost surely, 2^805879988 is an apocalyptic number.

It is an amenable number.

805879988 is a deficient number, since it is larger than the sum of its proper divisors (605266672).

805879988 is a wasteful number, since it uses less digits than its factorization.

805879988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122386 (or 122384 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 62.

The square root of 805879988 is about 28388.0254332703. The cubic root of 805879988 is about 930.5865910470.

The spelling of 805879988 in words is "eight hundred five million, eight hundred seventy-nine thousand, nine hundred eighty-eight".