78879870 has 24 divisors (see below), whose sum is σ = 205087896. Its totient is φ = 21034608.

The previous prime is 78879851. The next prime is 78879883. The reversal of 78879870 is 7897887.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438132 + ... + 438311.

It is an arithmetic number, because the mean of its divisors is an integer number (8545329).

Almost surely, 2^78879870 is an apocalyptic number.

78879870 is an abundant number, since it is smaller than the sum of its proper divisors (126208026).

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

78879870 is a wasteful number, since it uses less digits than its factorization.

78879870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 876456 (or 876453 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 54.

The square root of 78879870 is about 8881.4340058349. The cubic root of 78879870 is about 428.8664392613.

The spelling of 78879870 in words is "seventy-eight million, eight hundred seventy-nine thousand, eight hundred seventy".