79863860 has 12 divisors (see below), whose sum is σ = 167714148. Its totient is φ = 31945536.

The previous prime is 79863827. The next prime is 79863881. The reversal of 79863860 is 6836897.

It can be written as a sum of positive squares in 2 ways, for example, as 61528336 + 18335524 = 7844^2 + 4282^2 .

It is a super-2 number, since 2×79863860² = 12756472268199200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996577 + ... + 1996616.

It is an arithmetic number, because the mean of its divisors is an integer number (13976179).

Almost surely, 2^79863860 is an apocalyptic number.

It is an amenable number.

79863860 is an abundant number, since it is smaller than the sum of its proper divisors (87850288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79863860 is a wasteful number, since it uses less digits than its factorization.

79863860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993202 (or 3993200 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 79863860 is about 8936.6582121059. The cubic root of 79863860 is about 430.6423786120.

The spelling of 79863860 in words is "seventy-nine million, eight hundred sixty-three thousand, eight hundred sixty".