78426688 has 28 divisors (see below), whose sum is σ = 162397440. Its totient is φ = 37507712.

The previous prime is 78426659. The next prime is 78426713. The reversal of 78426688 is 88662487.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25168 + ... + 28111.

Almost surely, 2^78426688 is an apocalyptic number.

It is an amenable number.

78426688 is an abundant number, since it is smaller than the sum of its proper divisors (83970752).

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

78426688 is a wasteful number, since it uses less digits than its factorization.

78426688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53314 (or 53304 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 78426688 is about 8855.8843714222. The cubic root of 78426688 is about 428.0435510462.

It can be divided in two parts, 784 and 26688, that added together give a palindrome (27472).

The spelling of 78426688 in words is "seventy-eight million, four hundred twenty-six thousand, six hundred eighty-eight".