618388 has 12 divisors (see below), whose sum is σ = 1117312. Its totient is φ = 299160.

The previous prime is 618377. The next prime is 618407. The reversal of 618388 is 883816.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2370 + ... + 2617.

2⁶¹⁸³⁸⁸ is an apocalyptic number.

It is an amenable number.

618388 is a deficient number, since it is larger than the sum of its proper divisors (498924).

618388 is a wasteful number, since it uses less digits than its factorization.

618388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5022 (or 5020 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 618388 is about 786.3765001575. The cubic root of 618388 is about 85.1962248616.

The spelling of 618388 in words is "six hundred eighteen thousand, three hundred eighty-eight".