82510040 has 32 divisors (see below), whose sum is σ = 190179360. Its totient is φ = 32198400.

The previous prime is 82510033. The next prime is 82510063. The reversal of 82510040 is 4001528.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 82509994 and 82510021.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23516 + ... + 26795.

It is an arithmetic number, because the mean of its divisors is an integer number (5943105).

Almost surely, 2^82510040 is an apocalyptic number.

It is an amenable number.

82510040 is an abundant number, since it is smaller than the sum of its proper divisors (107669320).

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

82510040 is a wasteful number, since it uses less digits than its factorization.

82510040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50363 (or 50359 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 82510040 is about 9083.5037292886. The cubic root of 82510040 is about 435.3470432647.

Adding to 82510040 its reverse (4001528), we get a palindrome (86511568).

The spelling of 82510040 in words is "eighty-two million, five hundred ten thousand, forty".