78500442 has 16 divisors (see below), whose sum is σ = 157101120. Its totient is φ = 26150112.

The previous prime is 78500437. The next prime is 78500467. The reversal of 78500442 is 24400587.

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, 9403 + ... + 15665.

It is an arithmetic number, because the mean of its divisors is an integer number (9818820).

Almost surely, 2^78500442 is an apocalyptic number.

78500442 is an abundant number, since it is smaller than the sum of its proper divisors (78600678).

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

78500442 is a wasteful number, since it uses less digits than its factorization.

78500442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8357.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 78500442 is about 8860.0475168026. The cubic root of 78500442 is about 428.1776891979.

The spelling of 78500442 in words is "seventy-eight million, five hundred thousand, four hundred forty-two".