82475640 has 96 divisors (see below), whose sum is σ = 288681120. Its totient is φ = 20300544.

The previous prime is 82475639. The next prime is 82475651. The reversal of 82475640 is 4657428.

82475640 is a `hidden beast` number, since 8 + 2 + 4 + 7 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 82475595 and 82475604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4132 + ... + 13491.

It is an arithmetic number, because the mean of its divisors is an integer number (3007095).

Almost surely, 2^82475640 is an apocalyptic number.

It is an amenable number.

82475640 is an abundant number, since it is smaller than the sum of its proper divisors (206205480).

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

82475640 is a wasteful number, since it uses less digits than its factorization.

82475640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17653 (or 17646 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 36.

The square root of 82475640 is about 9081.6099894237. The cubic root of 82475640 is about 435.2865333759.

The spelling of 82475640 in words is "eighty-two million, four hundred seventy-five thousand, six hundred forty".