78872015 has 8 divisors (see below), whose sum is σ = 95016240. Its totient is φ = 62851072.

The previous prime is 78872009. The next prime is 78872023. The reversal of 78872015 is 51027887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78872015 - 2⁴ = 78871999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78872015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29405 + ... + 31974.

It is an arithmetic number, because the mean of its divisors is an integer number (11877030).

Almost surely, 2^78872015 is an apocalyptic number.

78872015 is a deficient number, since it is larger than the sum of its proper divisors (16144225).

78872015 is a wasteful number, since it uses less digits than its factorization.

78872015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61641.

The product of its (nonzero) digits is 31360, while the sum is 38.

The square root of 78872015 is about 8880.9917802011. The cubic root of 78872015 is about 428.8522030237.

The spelling of 78872015 in words is "seventy-eight million, eight hundred seventy-two thousand, fifteen".