79857618 has 16 divisors (see below), whose sum is σ = 164032320. Its totient is φ = 25899696.

The previous prime is 79857611. The next prime is 79857623. The reversal of 79857618 is 81675897.

It is not an unprimeable number, because it can be changed into a prime (79857611) 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, 179638 + ... + 180081.

It is an arithmetic number, because the mean of its divisors is an integer number (10252020).

Almost surely, 2^79857618 is an apocalyptic number.

79857618 is an abundant number, since it is smaller than the sum of its proper divisors (84174702).

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

79857618 is a wasteful number, since it uses less digits than its factorization.

79857618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359761.

The product of its digits is 846720, while the sum is 51.

The square root of 79857618 is about 8936.3089695914. The cubic root of 79857618 is about 430.6311589365.

The spelling of 79857618 in words is "seventy-nine million, eight hundred fifty-seven thousand, six hundred eighteen".