618354438 has 64 divisors (see below), whose sum is σ = 1363454400. Its totient is φ = 186900480.

The previous prime is 618354433. The next prime is 618354439. The reversal of 618354438 is 834453816.

618354438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 618354438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (618354433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 803718 + ... + 804486.

It is an arithmetic number, because the mean of its divisors is an integer number (21303975).

Almost surely, 2^618354438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618354438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (681727200).

618354438 is an abundant number, since it is smaller than the sum of its proper divisors (745099962).

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

618354438 is a wasteful number, since it uses less digits than its factorization.

618354438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 848 counting only the distinct ones).

The product of its digits is 276480, while the sum is 42.

The square root of 618354438 is about 24866.7335611254. The cubic root of 618354438 is about 851.9468353830.

The spelling of 618354438 in words is "six hundred eighteen million, three hundred fifty-four thousand, four hundred thirty-eight".