82500820 has 24 divisors (see below), whose sum is σ = 174321504. Its totient is φ = 32796576.

The previous prime is 82500799. The next prime is 82500829. The reversal of 82500820 is 2800528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82500829) 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, 9394 + ... + 15913.

It is an arithmetic number, because the mean of its divisors is an integer number (7263396).

Almost surely, 2^82500820 is an apocalyptic number.

It is an amenable number.

82500820 is an abundant number, since it is smaller than the sum of its proper divisors (91820684).

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

82500820 is a wasteful number, since it uses less digits than its factorization.

82500820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25479 (or 25477 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 82500820 is about 9082.9962016947. The cubic root of 82500820 is about 435.3308268573.

The spelling of 82500820 in words is "eighty-two million, five hundred thousand, eight hundred twenty".