80980056 has 96 divisors (see below), whose sum is σ = 232128000. Its totient is φ = 25451712.

The previous prime is 80980007. The next prime is 80980057. The reversal of 80980056 is 65008908.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 80980056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80980057) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 130515 + ... + 131133.

It is an arithmetic number, because the mean of its divisors is an integer number (2418000).

Almost surely, 2^80980056 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 80980056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116064000).

80980056 is an abundant number, since it is smaller than the sum of its proper divisors (151147944).

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

80980056 is a wasteful number, since it uses less digits than its factorization.

80980056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 80980056 is about 8998.8919317880. The cubic root of 80980056 is about 432.6393567878.

The spelling of 80980056 in words is "eighty million, nine hundred eighty thousand, fifty-six".