618616384 has 21 divisors (see below), whose sum is σ = 1227961857. Its totient is φ = 309208704.

The previous prime is 618616379. The next prime is 618616387. The reversal of 618616384 is 483616816.

It is a happy number.

The square root of 618616384 is 24872.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 109662784 + 508953600 = 10472^2 + 22560^2 .

It is a super-3 number, since 3×618616384³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 618616384.

It is not an unprimeable number, because it can be changed into a prime (618616387) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 197422 + ... + 200530.

Almost surely, 2^618616384 is an apocalyptic number.

618616384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

618616384 is the 24872-nd square number.

It is an amenable number.

618616384 is a deficient number, since it is larger than the sum of its proper divisors (609345473).

618616384 is an frugal number, since it uses more digits than its factorization.

618616384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230 (or 3111 counting only the distinct ones).

The product of its digits is 165888, while the sum is 43.

The cubic root of 618616384 is about 852.0671183725.

The spelling of 618616384 in words is "six hundred eighteen million, six hundred sixteen thousand, three hundred eighty-four".