918991104 has 36 divisors (see below), whose sum is σ = 2445858576. Its totient is φ = 306330112.

The previous prime is 918991103. The next prime is 918991109. The reversal of 918991104 is 401199819.

It is a happy number.

It is a super-2 number, since 2×918991104² = 1689089298462277632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (918991103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 597534 + ... + 599069.

It is an arithmetic number, because the mean of its divisors is an integer number (67940516).

Almost surely, 2^918991104 is an apocalyptic number.

It is an amenable number.

918991104 is an abundant number, since it is smaller than the sum of its proper divisors (1526867472).

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

918991104 is a wasteful number, since it uses less digits than its factorization.

918991104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1196622 (or 1196608 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 42.

The square root of 918991104 is about 30314.8660561118. The cubic root of 918991104 is about 972.2331740885.

The spelling of 918991104 in words is "nine hundred eighteen million, nine hundred ninety-one thousand, one hundred four".