79929018 has 56 divisors (see below), whose sum is σ = 193631508. Its totient is φ = 24587712.

The previous prime is 79928983. The next prime is 79929037. The reversal of 79929018 is 81092997.

It can be written as a sum of positive squares in 2 ways, for example, as 79869969 + 59049 = 8937^2 + 243^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 16846 + ... + 21062.

Almost surely, 2^79929018 is an apocalyptic number.

79929018 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 79929018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96815754).

79929018 is an abundant number, since it is smaller than the sum of its proper divisors (113702490).

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

79929018 is a wasteful number, since it uses less digits than its factorization.

79929018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4250 (or 4235 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 79929018 is about 8940.3030149990. The cubic root of 79929018 is about 430.7594618942.

The spelling of 79929018 in words is "seventy-nine million, nine hundred twenty-nine thousand, eighteen".