918988 has 24 divisors (see below), whose sum is σ = 1919232. Its totient is φ = 376464.

The previous prime is 918971. The next prime is 918989. The reversal of 918988 is 889819.

It is not an unprimeable number, because it can be changed into a prime (918989) by changing a digit.

918988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70 + ... + 1357.

It is an arithmetic number, because the mean of its divisors is an integer number (79968).

2⁹¹⁸⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

918988 is an abundant number, since it is smaller than the sum of its proper divisors (1000244).

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

918988 is a wasteful number, since it uses less digits than its factorization.

918988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461 (or 1459 counting only the distinct ones).

The product of its digits is 41472, while the sum is 43.

The square root of 918988 is about 958.6386180412. The cubic root of 918988 is about 97.2232079477.

The spelling of 918988 in words is "nine hundred eighteen thousand, nine hundred eighty-eight".