79687878 has 32 divisors (see below), whose sum is σ = 162950400. Its totient is φ = 25971936.

The previous prime is 79687873. The next prime is 79687913. The reversal of 79687878 is 87878697.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79687873) 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, 80575 + ... + 81557.

It is an arithmetic number, because the mean of its divisors is an integer number (5092200).

Almost surely, 2^79687878 is an apocalyptic number.

79687878 is an abundant number, since it is smaller than the sum of its proper divisors (83262522).

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

79687878 is a wasteful number, since it uses less digits than its factorization.

79687878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276.

The product of its digits is 9483264, while the sum is 60.

The square root of 79687878 is about 8926.8067078883. The cubic root of 79687878 is about 430.3258356005.

The spelling of 79687878 in words is "seventy-nine million, six hundred eighty-seven thousand, eight hundred seventy-eight".