79787738 has 16 divisors (see below), whose sum is σ = 124825344. Its totient is φ = 38206080.

The previous prime is 79787731. The next prime is 79787753. The reversal of 79787738 is 83778797.

It is not an unprimeable number, because it can be changed into a prime (79787731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620 + ... + 12647.

It is an arithmetic number, because the mean of its divisors is an integer number (7801584).

Almost surely, 2^79787738 is an apocalyptic number.

79787738 is a deficient number, since it is larger than the sum of its proper divisors (45037606).

79787738 is a wasteful number, since it uses less digits than its factorization.

79787738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13397.

The product of its digits is 4148928, while the sum is 56.

The square root of 79787738 is about 8932.3982222021. The cubic root of 79787738 is about 430.5055132855.

The spelling of 79787738 in words is "seventy-nine million, seven hundred eighty-seven thousand, seven hundred thirty-eight".