82704840 has 64 divisors (see below), whose sum is σ = 250430400. Its totient is φ = 21848832.

The previous prime is 82704833. The next prime is 82704851. The reversal of 82704840 is 4840728.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9919 + ... + 16241.

It is an arithmetic number, because the mean of its divisors is an integer number (3912975).

Almost surely, 2^82704840 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 82704840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (125215200).

82704840 is an abundant number, since it is smaller than the sum of its proper divisors (167725560).

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

82704840 is a wasteful number, since it uses less digits than its factorization.

82704840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6446 (or 6442 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 82704840 is about 9094.2201424861. The cubic root of 82704840 is about 435.6893812054.

The spelling of 82704840 in words is "eighty-two million, seven hundred four thousand, eight hundred forty".