79774560 has 72 divisors (see below), whose sum is σ = 272235600. Its totient is φ = 21272832.

The previous prime is 79774543. The next prime is 79774601. The reversal of 79774560 is 6547797.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26260 + ... + 29139.

It is an arithmetic number, because the mean of its divisors is an integer number (3781050).

Almost surely, 2^79774560 is an apocalyptic number.

It is an amenable number.

79774560 is an abundant number, since it is smaller than the sum of its proper divisors (192461040).

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

79774560 is a wasteful number, since it uses less digits than its factorization.

79774560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55420 (or 55409 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 45.

The square root of 79774560 is about 8931.6605398996. The cubic root of 79774560 is about 430.4818107544.

It can be divided in two parts, 797 and 74560, that added together give a palindrome (75357).

The spelling of 79774560 in words is "seventy-nine million, seven hundred seventy-four thousand, five hundred sixty".