82581288 has 32 divisors (see below), whose sum is σ = 207231360. Its totient is φ = 27423360.

The previous prime is 82581269. The next prime is 82581329. The reversal of 82581288 is 88218528.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156 + ... + 12852.

It is an arithmetic number, because the mean of its divisors is an integer number (6475980).

Almost surely, 2^82581288 is an apocalyptic number.

It is an amenable number.

82581288 is an abundant number, since it is smaller than the sum of its proper divisors (124650072).

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

82581288 is a wasteful number, since it uses less digits than its factorization.

82581288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12977 (or 12973 counting only the distinct ones).

The product of its digits is 81920, while the sum is 42.

The square root of 82581288 is about 9087.4247177074. The cubic root of 82581288 is about 435.4723156252.

The spelling of 82581288 in words is "eighty-two million, five hundred eighty-one thousand, two hundred eighty-eight".