82881580 has 12 divisors (see below), whose sum is σ = 174051360. Its totient is φ = 33152624.

The previous prime is 82881571. The next prime is 82881593. The reversal of 82881580 is 8518828.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2072020 + ... + 2072059.

It is an arithmetic number, because the mean of its divisors is an integer number (14504280).

Almost surely, 2^82881580 is an apocalyptic number.

It is an amenable number.

82881580 is an abundant number, since it is smaller than the sum of its proper divisors (91169780).

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

82881580 is a wasteful number, since it uses less digits than its factorization.

82881580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4144088 (or 4144086 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 40.

The square root of 82881580 is about 9103.9321174974. The cubic root of 82881580 is about 435.9995160335. Note that the first 3 decimals are identical.

The spelling of 82881580 in words is "eighty-two million, eight hundred eighty-one thousand, five hundred eighty".