82406540 has 24 divisors (see below), whose sum is σ = 173482512. Its totient is φ = 32880960.

The previous prime is 82406501. The next prime is 82406551. The reversal of 82406540 is 4560428.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3527 + ... + 13313.

It is an arithmetic number, because the mean of its divisors is an integer number (7228438).

Almost surely, 2^82406540 is an apocalyptic number.

It is an amenable number.

82406540 is an abundant number, since it is smaller than the sum of its proper divisors (91075972).

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

82406540 is a wasteful number, since it uses less digits than its factorization.

82406540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10217 (or 10215 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 82406540 is about 9077.8048007214. The cubic root of 82406540 is about 435.1649350330.

Adding to 82406540 its reverse (4560428), we get a palindrome (86966968).

The spelling of 82406540 in words is "eighty-two million, four hundred six thousand, five hundred forty".