818397108 has 90 divisors (see below), whose sum is σ = 2258303586. Its totient is φ = 258404256.

The previous prime is 818397101. The next prime is 818397121. The reversal of 818397108 is 801793818.

It can be written as a sum of positive squares in only one way, i.e., 640494864 + 177902244 = 25308^2 + 13338^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818397101) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 113466 + ... + 120462.

Almost surely, 2^818397108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818397108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129151793).

818397108 is an abundant number, since it is smaller than the sum of its proper divisors (1439906478).

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

818397108 is a wasteful number, since it uses less digits than its factorization.

818397108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7051 (or 7021 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 818397108 is about 28607.6407276098. The cubic root of 818397108 is about 935.3798900502.

The spelling of 818397108 in words is "eight hundred eighteen million, three hundred ninety-seven thousand, one hundred eight".