618740 has 12 divisors (see below), whose sum is σ = 1299396. Its totient is φ = 247488.

The previous prime is 618719. The next prime is 618799. The reversal of 618740 is 47816.

618740 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 139876 + 478864 = 374^2 + 692^2 .

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, 15449 + ... + 15488.

It is an arithmetic number, because the mean of its divisors is an integer number (108283).

2⁶¹⁸⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

618740 is an abundant number, since it is smaller than the sum of its proper divisors (680656).

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

618740 is a wasteful number, since it uses less digits than its factorization.

618740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30946 (or 30944 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 618740 is about 786.6002796847. The cubic root of 618740 is about 85.2123869814.

The spelling of 618740 in words is "six hundred eighteen thousand, seven hundred forty".