82557918 has 12 divisors (see below), whose sum is σ = 178875528. Its totient is φ = 27519300.

The previous prime is 82557829. The next prime is 82557919. The reversal of 82557918 is 81975528.

It is a happy number.

82557918 is a `hidden beast` number, since 8 + 2 + 557 + 91 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82557919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2293258 + ... + 2293293.

It is an arithmetic number, because the mean of its divisors is an integer number (14906294).

Almost surely, 2^82557918 is an apocalyptic number.

82557918 is an abundant number, since it is smaller than the sum of its proper divisors (96317610).

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

82557918 is a wasteful number, since it uses less digits than its factorization.

82557918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4586559 (or 4586556 counting only the distinct ones).

The product of its digits is 201600, while the sum is 45.

The square root of 82557918 is about 9086.1387838839. The cubic root of 82557918 is about 435.4312330813.

The spelling of 82557918 in words is "eighty-two million, five hundred fifty-seven thousand, nine hundred eighteen".