82039808 has 44 divisors (see below), whose sum is σ = 165684180. Its totient is φ = 40599552.

The previous prime is 82039799. The next prime is 82039871. The reversal of 82039808 is 80893028.

It can be written as a sum of positive squares in 2 ways, for example, as 5161984 + 76877824 = 2272^2 + 8768^2 .

It is a congruent number.

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, 115358 + ... + 116066.

Almost surely, 2^82039808 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 82039808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82842090).

82039808 is an abundant number, since it is smaller than the sum of its proper divisors (83644372).

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

82039808 is a wasteful number, since it uses less digits than its factorization.

82039808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842 (or 824 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 82039808 is about 9057.5829005315. The cubic root of 82039808 is about 434.5184400973.

The spelling of 82039808 in words is "eighty-two million, thirty-nine thousand, eight hundred eight".