78872859 has 20 divisors (see below), whose sum is σ = 126887376. Its totient is φ = 48536496.

The previous prime is 78872839. The next prime is 78872861. The reversal of 78872859 is 95827887.

It is not a de Polignac number, because 78872859 - 2⁹ = 78872347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78872839) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 36399 + ... + 38504.

Almost surely, 2^78872859 is an apocalyptic number.

78872859 is a deficient number, since it is larger than the sum of its proper divisors (48014517).

78872859 is a wasteful number, since it uses less digits than its factorization.

78872859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74928 (or 74919 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 78872859 is about 8881.0392972895. The cubic root of 78872859 is about 428.8537327170.

The spelling of 78872859 in words is "seventy-eight million, eight hundred seventy-two thousand, eight hundred fifty-nine".