2304388638 has 48 divisors (see below), whose sum is σ = 5200112736. Its totient is φ = 736827840.

The previous prime is 2304388637. The next prime is 2304388663. The reversal of 2304388638 is 8368834032.

2304388638 is a `hidden beast` number, since 2 + 3 + 0 + 4 + 3 + 8 + 8 + 638 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 2304388593 and 2304388602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2304388631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22920 + ... + 71652.

It is an arithmetic number, because the mean of its divisors is an integer number (108335682).

Almost surely, 2^2304388638 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2304388638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2600056368).

2304388638 is an abundant number, since it is smaller than the sum of its proper divisors (2895724098).

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

2304388638 is a wasteful number, since it uses less digits than its factorization.

2304388638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48849 (or 48846 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The square root of 2304388638 is about 48004.0481417974. The cubic root of 2304388638 is about 1320.8451577903.

The spelling of 2304388638 in words is "two billion, three hundred four million, three hundred eighty-eight thousand, six hundred thirty-eight".