38439401868 has 72 divisors (see below), whose sum is σ = 111223607040. Its totient is φ = 10965235680.

The previous prime is 38439401857. The next prime is 38439401873. The reversal of 38439401868 is 86810493483.

38439401868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 38143 + ... + 279881.

It is an arithmetic number, because the mean of its divisors is an integer number (1544772320).

Almost surely, 2^38439401868 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 38439401868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55611803520).

38439401868 is an abundant number, since it is smaller than the sum of its proper divisors (72784205172).

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

38439401868 is a wasteful number, since it uses less digits than its factorization.

38439401868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242387 (or 242382 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 38439401868 in words is "thirty-eight billion, four hundred thirty-nine million, four hundred one thousand, eight hundred sixty-eight".