78426885 has 16 divisors (see below), whose sum is σ = 125601984. Its totient is φ = 41788032.

The previous prime is 78426857. The next prime is 78426919. The reversal of 78426885 is 58862487.

It is not a de Polignac number, because 78426885 - 2⁵ = 78426853 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21129 + ... + 24561.

It is an arithmetic number, because the mean of its divisors is an integer number (7850124).

Almost surely, 2^78426885 is an apocalyptic number.

It is an amenable number.

78426885 is a deficient number, since it is larger than the sum of its proper divisors (47175099).

78426885 is a wasteful number, since it uses less digits than its factorization.

78426885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4964.

The product of its digits is 860160, while the sum is 48.

The square root of 78426885 is about 8855.8954939633. The cubic root of 78426885 is about 428.0439094468.

The spelling of 78426885 in words is "seventy-eight million, four hundred twenty-six thousand, eight hundred eighty-five".