79770078 has 12 divisors (see below), whose sum is σ = 172835208. Its totient is φ = 26590020.

The previous prime is 79770073. The next prime is 79770107. The reversal of 79770078 is 87007797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79770073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2215818 + ... + 2215853.

It is an arithmetic number, because the mean of its divisors is an integer number (14402934).

Almost surely, 2^79770078 is an apocalyptic number.

79770078 is an abundant number, since it is smaller than the sum of its proper divisors (93065130).

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

79770078 is a wasteful number, since it uses less digits than its factorization.

79770078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431679 (or 4431676 counting only the distinct ones).

The product of its (nonzero) digits is 172872, while the sum is 45.

The square root of 79770078 is about 8931.4096311836. The cubic root of 79770078 is about 430.4737486370.

The spelling of 79770078 in words is "seventy-nine million, seven hundred seventy thousand, seventy-eight".