918139684 has 24 divisors (see below), whose sum is σ = 2003214528. Its totient is φ = 357716640.

The previous prime is 918139669. The next prime is 918139687. The reversal of 918139684 is 486931819.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (918139687) 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, 1490179 + ... + 1490794.

It is an arithmetic number, because the mean of its divisors is an integer number (83467272).

Almost surely, 2^918139684 is an apocalyptic number.

It is an amenable number.

918139684 is an abundant number, since it is smaller than the sum of its proper divisors (1085074844).

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

918139684 is a wasteful number, since it uses less digits than its factorization.

918139684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2980995 (or 2980993 counting only the distinct ones).

The product of its digits is 373248, while the sum is 49.

The square root of 918139684 is about 30300.8198568950. The cubic root of 918139684 is about 971.9328322116.

The spelling of 918139684 in words is "nine hundred eighteen million, one hundred thirty-nine thousand, six hundred eighty-four".