82660440 has 64 divisors (see below), whose sum is σ = 256543200. Its totient is φ = 21281792.

The previous prime is 82660439. The next prime is 82660453. The reversal of 82660440 is 4406628.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 82660398 and 82660407.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 8397 + ... + 15356.

Almost surely, 2^82660440 is an apocalyptic number.

It is an amenable number.

82660440 is an abundant number, since it is smaller than the sum of its proper divisors (173882760).

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

82660440 is a wasteful number, since it uses less digits than its factorization.

82660440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23796 (or 23792 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 82660440 is about 9091.7787038621. The cubic root of 82660440 is about 435.6114007983.

The spelling of 82660440 in words is "eighty-two million, six hundred sixty thousand, four hundred forty".