79747128 has 48 divisors (see below), whose sum is σ = 222955200. Its totient is φ = 25724160.

The previous prime is 79747127. The next prime is 79747169. The reversal of 79747128 is 82174797.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79747127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15633 + ... + 20096.

It is an arithmetic number, because the mean of its divisors is an integer number (4644900).

Almost surely, 2^79747128 is an apocalyptic number.

It is an amenable number.

79747128 is an abundant number, since it is smaller than the sum of its proper divisors (143208072).

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

79747128 is a wasteful number, since it uses less digits than its factorization.

79747128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35772 (or 35765 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 79747128 is about 8930.1247471690. The cubic root of 79747128 is about 430.4324619776.

The spelling of 79747128 in words is "seventy-nine million, seven hundred forty-seven thousand, one hundred twenty-eight".