79986885 has 16 divisors (see below), whose sum is σ = 139613760. Its totient is φ = 38781440.

The previous prime is 79986877. The next prime is 79986889. The reversal of 79986885 is 58868997.

It is a happy number.

It is not a de Polignac number, because 79986885 - 2³ = 79986877 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79986889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242220 + ... + 242549.

It is an arithmetic number, because the mean of its divisors is an integer number (8725860).

Almost surely, 2^79986885 is an apocalyptic number.

It is an amenable number.

79986885 is a deficient number, since it is larger than the sum of its proper divisors (59626875).

79986885 is a wasteful number, since it uses less digits than its factorization.

79986885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484788.

The product of its digits is 8709120, while the sum is 60.

The square root of 79986885 is about 8943.5387291608. The cubic root of 79986885 is about 430.8633905438.

The spelling of 79986885 in words is "seventy-nine million, nine hundred eighty-six thousand, eight hundred eighty-five".