818389056 has 56 divisors (see below), whose sum is σ = 2179929600. Its totient is φ = 270956032.

The previous prime is 818389043. The next prime is 818389093. The reversal of 818389056 is 650983818.

It is a super-2 number, since 2×818389056² = 1339521293961142272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 818388996 and 818389014.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14305 + ... + 42911.

Almost surely, 2^818389056 is an apocalyptic number.

It is a pronic number, being equal to 28607×28608.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818389056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1089964800).

818389056 is an abundant number, since it is smaller than the sum of its proper divisors (1361540544).

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

818389056 is a wasteful number, since it uses less digits than its factorization.

818389056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28771 (or 28761 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The square root of 818389056 is about 28607.4999956305. The cubic root of 818389056 is about 935.3768223856.

The spelling of 818389056 in words is "eight hundred eighteen million, three hundred eighty-nine thousand, fifty-six".