918920 has 16 divisors (see below), whose sum is σ = 2067660. Its totient is φ = 367552.

The previous prime is 918913. The next prime is 918943. The reversal of 918920 is 29819.

It can be written as a sum of positive squares in 2 ways, for example, as 917764 + 1156 = 958^2 + 34^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11447 + ... + 11526.

2⁹¹⁸⁹²⁰ is an apocalyptic number.

It is an amenable number.

918920 is an abundant number, since it is smaller than the sum of its proper divisors (1148740).

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

918920 is a wasteful number, since it uses less digits than its factorization.

918920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22984 (or 22980 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 918920 is about 958.6031504225. The cubic root of 918920 is about 97.2208098963.

The spelling of 918920 in words is "nine hundred eighteen thousand, nine hundred twenty".