618724 has 6 divisors (see below), whose sum is σ = 1082774. Its totient is φ = 309360.

The previous prime is 618719. The next prime is 618799. The reversal of 618724 is 427816.

It can be written as a sum of positive squares in only one way, i.e., 589824 + 28900 = 768^2 + 170^2 .

It is a junction number, because it is equal to n+sod(n) for n = 618692 and 618701.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77337 + ... + 77344.

2⁶¹⁸⁷²⁴ is an apocalyptic number.

It is an amenable number.

618724 is a deficient number, since it is larger than the sum of its proper divisors (464050).

618724 is a wasteful number, since it uses less digits than its factorization.

618724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154685 (or 154683 counting only the distinct ones).

The product of its digits is 2688, while the sum is 28.

The square root of 618724 is about 786.5901092691. The cubic root of 618724 is about 85.2116524726.

The spelling of 618724 in words is "six hundred eighteen thousand, seven hundred twenty-four".