818989944 has 16 divisors (see below), whose sum is σ = 2047474920. Its totient is φ = 272996640.

The previous prime is 818989937. The next prime is 818989979. The reversal of 818989944 is 449989818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17062267 + ... + 17062314.

Almost surely, 2^818989944 is an apocalyptic number.

It is an amenable number.

818989944 is an abundant number, since it is smaller than the sum of its proper divisors (1228484976).

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

818989944 is a wasteful number, since it uses less digits than its factorization.

818989944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34124590 (or 34124586 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 60.

The square root of 818989944 is about 28618.0003494304. Note that the first 3 decimals coincide. The cubic root of 818989944 is about 935.6056944605.

The spelling of 818989944 in words is "eight hundred eighteen million, nine hundred eighty-nine thousand, nine hundred forty-four".