82782580 has 12 divisors (see below), whose sum is σ = 173843460. Its totient is φ = 33113024.

The previous prime is 82782577. The next prime is 82782619. The reversal of 82782580 is 8528728.

It can be written as a sum of positive squares in 2 ways, for example, as 52620516 + 30162064 = 7254^2 + 5492^2 .

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, 2069545 + ... + 2069584.

It is an arithmetic number, because the mean of its divisors is an integer number (14486955).

Almost surely, 2^82782580 is an apocalyptic number.

It is an amenable number.

82782580 is an abundant number, since it is smaller than the sum of its proper divisors (91060880).

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

82782580 is a wasteful number, since it uses less digits than its factorization.

82782580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4139138 (or 4139136 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 40.

The square root of 82782580 is about 9098.4932818572. The cubic root of 82782580 is about 435.8258499845.

The spelling of 82782580 in words is "eighty-two million, seven hundred eighty-two thousand, five hundred eighty".