80979712 has 72 divisors (see below), whose sum is σ = 178441200. Its totient is φ = 36372480.

The previous prime is 80979709. The next prime is 80979727. The reversal of 80979712 is 21797908.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419488 + ... + 419680.

It is an arithmetic number, because the mean of its divisors is an integer number (2478350).

Almost surely, 2^80979712 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 80979712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89220600).

80979712 is an abundant number, since it is smaller than the sum of its proper divisors (97461488).

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

80979712 is a wasteful number, since it uses less digits than its factorization.

80979712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 80979712 is about 8998.8728183034. The cubic root of 80979712 is about 432.6387441755.

The spelling of 80979712 in words is "eighty million, nine hundred seventy-nine thousand, seven hundred twelve".