82639332 has 48 divisors (see below), whose sum is σ = 215537280. Its totient is φ = 27381024.

The previous prime is 82639229. The next prime is 82639339. The reversal of 82639332 is 23393628.

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

It is not an unprimeable number, because it can be changed into a prime (82639339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16473 + ... + 20895.

It is an arithmetic number, because the mean of its divisors is an integer number (4490360).

Almost surely, 2^82639332 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 82639332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107768640).

82639332 is an abundant number, since it is smaller than the sum of its proper divisors (132897948).

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

82639332 is a wasteful number, since it uses less digits than its factorization.

82639332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609 (or 4601 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 82639332 is about 9090.6178007878. The cubic root of 82639332 is about 435.5743186978.

The spelling of 82639332 in words is "eighty-two million, six hundred thirty-nine thousand, three hundred thirty-two".