78739134 has 16 divisors (see below), whose sum is σ = 157807488. Its totient is φ = 26191512.

The previous prime is 78739109. The next prime is 78739153. The reversal of 78739134 is 43193787.

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, 10552 + ... + 16395.

It is an arithmetic number, because the mean of its divisors is an integer number (9862968).

Almost surely, 2^78739134 is an apocalyptic number.

78739134 is an abundant number, since it is smaller than the sum of its proper divisors (79068354).

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

78739134 is a wasteful number, since it uses less digits than its factorization.

78739134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27439.

The product of its digits is 127008, while the sum is 42.

The square root of 78739134 is about 8873.5074237868. The cubic root of 78739134 is about 428.6112289069.

The spelling of 78739134 in words is "seventy-eight million, seven hundred thirty-nine thousand, one hundred thirty-four".