918980 has 12 divisors (see below), whose sum is σ = 1929900. Its totient is φ = 367584.

The previous prime is 918971. The next prime is 918989. The reversal of 918980 is 89819.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (918971) and next prime (918989).

It can be written as a sum of positive squares in 2 ways, for example, as 568516 + 350464 = 754^2 + 592^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 918980.

It is not an unprimeable number, because it can be changed into a prime (918989) 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, 22955 + ... + 22994.

It is an arithmetic number, because the mean of its divisors is an integer number (160825).

2⁹¹⁸⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

918980 is an abundant number, since it is smaller than the sum of its proper divisors (1010920).

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

918980 is a wasteful number, since it uses less digits than its factorization.

918980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45958 (or 45956 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 918980 is about 958.6344454483. The cubic root of 918980 is about 97.2229258301. Note that the first 3 decimals are identical.

It can be divided in two parts, 9 and 18980, that multiplied together give a triangular number (170820 = T₅₈₄).

The spelling of 918980 in words is "nine hundred eighteen thousand, nine hundred eighty".