618984 has 24 divisors (see below), whose sum is σ = 1676610. Its totient is φ = 206304.

The previous prime is 618979. The next prime is 618991. The reversal of 618984 is 489816.

It is a happy number.

618984 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 only one way, i.e., 476100 + 142884 = 690^2 + 378^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

618984 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 5 ways as a sum of consecutive naturals, for example, 4227 + ... + 4370.

2⁶¹⁸⁹⁸⁴ is an apocalyptic number.

It is an amenable number.

618984 is an abundant number, since it is smaller than the sum of its proper divisors (1057626).

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

618984 is a wasteful number, since it uses less digits than its factorization.

618984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8609 (or 8602 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 618984 is about 786.7553622315. The cubic root of 618984 is about 85.2235866721.

It can be divided in two parts, 61 and 8984, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 618984 in words is "six hundred eighteen thousand, nine hundred eighty-four".