618875244 has 72 divisors (see below), whose sum is σ = 1688162112. Its totient is φ = 190033920.

The previous prime is 618875219. The next prime is 618875291. The reversal of 618875244 is 442578816.

618875244 is a `hidden beast` number, since 618 + 8 + 7 + 5 + 24 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 618875244.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 298957 + ... + 301019.

It is an arithmetic number, because the mean of its divisors is an integer number (23446696).

Almost surely, 2^618875244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618875244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (844081056).

618875244 is an abundant number, since it is smaller than the sum of its proper divisors (1069286868).

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

618875244 is a wasteful number, since it uses less digits than its factorization.

618875244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727 (or 2722 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 618875244 is about 24877.2032994065. The cubic root of 618875244 is about 852.1859509489.

The spelling of 618875244 in words is "six hundred eighteen million, eight hundred seventy-five thousand, two hundred forty-four".