818783944 has 32 divisors (see below), whose sum is σ = 1678501440. Its totient is φ = 371348800.

The previous prime is 818783893. The next prime is 818783947. The reversal of 818783944 is 449387818.

It is a junction number, because it is equal to n+sod(n) for n = 818783891 and 818783900.

It is not an unprimeable number, because it can be changed into a prime (818783947) 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, 30477 + ... + 50659.

It is an arithmetic number, because the mean of its divisors is an integer number (52453170).

Almost surely, 2^818783944 is an apocalyptic number.

It is an amenable number.

818783944 is an abundant number, since it is smaller than the sum of its proper divisors (859717496).

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

818783944 is a wasteful number, since it uses less digits than its factorization.

818783944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20661 (or 20657 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 52.

The square root of 818783944 is about 28614.4009897115. The cubic root of 818783944 is about 935.5272437884.

The spelling of 818783944 in words is "eight hundred eighteen million, seven hundred eighty-three thousand, nine hundred forty-four".