82500440 has 64 divisors (see below), whose sum is σ = 204694560. Its totient is φ = 29675520.

The previous prime is 82500427. The next prime is 82500449. The reversal of 82500440 is 4400528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82500449) 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, 41714 + ... + 43646.

Almost surely, 2^82500440 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 82500440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102347280).

82500440 is an abundant number, since it is smaller than the sum of its proper divisors (122194120).

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

82500440 is a wasteful number, since it uses less digits than its factorization.

82500440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052 (or 2048 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 82500440 is about 9082.9752834630. The cubic root of 82500440 is about 435.3301584762.

Adding to 82500440 its reverse (4400528), we get a palindrome (86900968).

The spelling of 82500440 in words is "eighty-two million, five hundred thousand, four hundred forty".