818998936 has 128 divisors (see below), whose sum is σ = 1926288000. Its totient is φ = 325140480.

The previous prime is 818998909. The next prime is 818998949. The reversal of 818998936 is 639899818.

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4524766 + ... + 4524946.

It is an arithmetic number, because the mean of its divisors is an integer number (15049125).

Almost surely, 2^818998936 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 818998936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (963144000).

818998936 is an abundant number, since it is smaller than the sum of its proper divisors (1107289064).

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

818998936 is a wasteful number, since it uses less digits than its factorization.

818998936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 304 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 61.

The square root of 818998936 is about 28618.1574529179. The cubic root of 818998936 is about 935.6091185708.

The spelling of 818998936 in words is "eight hundred eighteen million, nine hundred ninety-eight thousand, nine hundred thirty-six".