79984656 has 90 divisors (see below), whose sum is σ = 229262670. Its totient is φ = 26028288.

The previous prime is 79984651. The next prime is 79984657. The reversal of 79984656 is 65648997.

It can be written as a sum of positive squares in only one way, i.e., 57517056 + 22467600 = 7584^2 + 4740^2 .

It is not an unprimeable number, because it can be changed into a prime (79984651) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 898660 + ... + 898748.

It is an arithmetic number, because the mean of its divisors is an integer number (2547363).

Almost surely, 2^79984656 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 79984656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114631335).

79984656 is an abundant number, since it is smaller than the sum of its proper divisors (149278014).

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

79984656 is a wasteful number, since it uses less digits than its factorization.

79984656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261 (or 173 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 54.

The square root of 79984656 is about 8943.4141131897. The cubic root of 79984656 is about 430.8593882067.

The spelling of 79984656 in words is "seventy-nine million, nine hundred eighty-four thousand, six hundred fifty-six".