82581648 has 40 divisors (see below), whose sum is σ = 225887328. Its totient is φ = 25907712.

The previous prime is 82581601. The next prime is 82581649. The reversal of 82581648 is 84618528.

It is not an unprimeable number, because it can be changed into a prime (82581649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49786 + ... + 51417.

Almost surely, 2^82581648 is an apocalyptic number.

It is an amenable number.

82581648 is an abundant number, since it is smaller than the sum of its proper divisors (143305680).

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

82581648 is a wasteful number, since it uses less digits than its factorization.

82581648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101231 (or 101225 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The square root of 82581648 is about 9087.4445252777. Note that the first 3 decimals coincide. The cubic root of 82581648 is about 435.4729484151.

The spelling of 82581648 in words is "eighty-two million, five hundred eighty-one thousand, six hundred forty-eight".