918688 has 24 divisors (see below), whose sum is σ = 1905120. Its totient is φ = 434880.

The previous prime is 918683. The next prime is 918733. The reversal of 918688 is 886819.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 918688.

It is not an unprimeable number, because it can be changed into a prime (918683) 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, 148 + ... + 1363.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2⁹¹⁸⁶⁸⁸ is an apocalyptic number.

It is an amenable number.

918688 is an abundant number, since it is smaller than the sum of its proper divisors (986432).

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

918688 is a wasteful number, since it uses less digits than its factorization.

918688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540 (or 1532 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 918688 is about 958.4821333755. The cubic root of 918688 is about 97.2126274190.

The spelling of 918688 in words is "nine hundred eighteen thousand, six hundred eighty-eight".