618879438 has 48 divisors (see below), whose sum is σ = 1435449600. Its totient is φ = 192116880.

The previous prime is 618879403. The next prime is 618879451. The reversal of 618879438 is 834978816.

618879438 is a `hidden beast` number, since 61 + 88 + 79 + 438 = 666.

It is a congruent number.

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, 4843 + ... + 35513.

It is an arithmetic number, because the mean of its divisors is an integer number (29905200).

Almost surely, 2^618879438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618879438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (717724800).

618879438 is an abundant number, since it is smaller than the sum of its proper divisors (816570162).

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

618879438 is a wasteful number, since it uses less digits than its factorization.

618879438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30757 (or 30754 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 618879438 is about 24877.2875933049. The cubic root of 618879438 is about 852.1878759787.

The spelling of 618879438 in words is "six hundred eighteen million, eight hundred seventy-nine thousand, four hundred thirty-eight".