79879860 has 36 divisors (see below), whose sum is σ = 242302788. Its totient is φ = 21301248.

The previous prime is 79879859. The next prime is 79879861. The reversal of 79879860 is 6897897.

It is an interprime number because it is at equal distance from previous prime (79879859) and next prime (79879861).

It can be written as a sum of positive squares in 2 ways, for example, as 30935844 + 48944016 = 5562^2 + 6996^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 79879797 and 79879806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79879861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 221709 + ... + 222068.

It is an arithmetic number, because the mean of its divisors is an integer number (6730633).

Almost surely, 2^79879860 is an apocalyptic number.

It is an amenable number.

79879860 is an abundant number, since it is smaller than the sum of its proper divisors (162422928).

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

79879860 is a wasteful number, since it uses less digits than its factorization.

79879860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443792 (or 443787 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The square root of 79879860 is about 8937.5533564841. The cubic root of 79879860 is about 430.6711351233.

The spelling of 79879860 in words is "seventy-nine million, eight hundred seventy-nine thousand, eight hundred sixty".