79747956 has 96 divisors (see below), whose sum is σ = 213857280. Its totient is φ = 25689312.

The previous prime is 79747951. The next prime is 79747957. The reversal of 79747956 is 65974797.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79747951) 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 31 ways as a sum of consecutive naturals, for example, 745255 + ... + 745361.

It is an arithmetic number, because the mean of its divisors is an integer number (2227680).

Almost surely, 2^79747956 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79747956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106928640).

79747956 is an abundant number, since it is smaller than the sum of its proper divisors (134109324).

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

79747956 is a wasteful number, since it uses less digits than its factorization.

79747956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290 (or 282 counting only the distinct ones).

The product of its digits is 3333960, while the sum is 54.

The square root of 79747956 is about 8930.1711069833. The cubic root of 79747956 is about 430.4339516732.

The spelling of 79747956 in words is "seventy-nine million, seven hundred forty-seven thousand, nine hundred fifty-six".