82218456 has 32 divisors (see below), whose sum is σ = 228385200. Its totient is φ = 27406080.

The previous prime is 82218449. The next prime is 82218457. The reversal of 82218456 is 65481228.

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

It is a self number, because there is not a number n which added to its sum of digits gives 82218456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82218457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 190105 + ... + 190536.

Almost surely, 2^82218456 is an apocalyptic number.

It is an amenable number.

82218456 is an abundant number, since it is smaller than the sum of its proper divisors (146166744).

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

82218456 is a wasteful number, since it uses less digits than its factorization.

82218456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380656 (or 380646 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 82218456 is about 9067.4393298218. The cubic root of 82218456 is about 434.8336105608.

The spelling of 82218456 in words is "eighty-two million, two hundred eighteen thousand, four hundred fifty-six".