79987756 has 12 divisors (see below), whose sum is σ = 140114520. Its totient is φ = 39955040.

The previous prime is 79987751. The next prime is 79987757. The reversal of 79987756 is 65778997.

It is a super-2 number, since 2×79987756² = 12796082219831072, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79987756.

It is not an unprimeable number, because it can be changed into a prime (79987751) 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, 4801 + ... + 13528.

It is an arithmetic number, because the mean of its divisors is an integer number (11676210).

Almost surely, 2^79987756 is an apocalyptic number.

It is an amenable number.

79987756 is a deficient number, since it is larger than the sum of its proper divisors (60126764).

79987756 is a wasteful number, since it uses less digits than its factorization.

79987756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19424 (or 19422 counting only the distinct ones).

The product of its digits is 6667920, while the sum is 58.

The square root of 79987756 is about 8943.5874234001. The cubic root of 79987756 is about 430.8649544695.

The spelling of 79987756 in words is "seventy-nine million, nine hundred eighty-seven thousand, seven hundred fifty-six".