618980 has 12 divisors (see below), whose sum is σ = 1299900. Its totient is φ = 247584.

The previous prime is 618979. The next prime is 618991. The reversal of 618980 is 89816.

618980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 440896 + 178084 = 664^2 + 422^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15455 + ... + 15494.

It is an arithmetic number, because the mean of its divisors is an integer number (108325).

2⁶¹⁸⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

618980 is an abundant number, since it is smaller than the sum of its proper divisors (680920).

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

618980 is a wasteful number, since it uses less digits than its factorization.

618980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30958 (or 30956 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 618980 is about 786.7528201411. The cubic root of 618980 is about 85.2234030943.

The spelling of 618980 in words is "six hundred eighteen thousand, nine hundred eighty".