818470990 has 32 divisors (see below), whose sum is σ = 1522851840. Its totient is φ = 316394400.

The previous prime is 818470981. The next prime is 818470993. The reversal of 818470990 is 99074818.

It is a happy number.

It is a super-2 number, since 2×818470990² = 1339789522943160200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 818470990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818470993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314595 + ... + 317185.

It is an arithmetic number, because the mean of its divisors is an integer number (47589120).

Almost surely, 2^818470990 is an apocalyptic number.

818470990 is a deficient number, since it is larger than the sum of its proper divisors (704380850).

818470990 is a wasteful number, since it uses less digits than its factorization.

818470990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3648.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 818470990 is about 28608.9319968432. The cubic root of 818470990 is about 935.4080368007.

The spelling of 818470990 in words is "eight hundred eighteen million, four hundred seventy thousand, nine hundred ninety".