38942189440 has 256 divisors, whose sum is σ = 118444032000. Its totient is φ = 12137072640.

The previous prime is 38942189417. The next prime is 38942189497. The reversal of 38942189440 is 4498124983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2406657 + ... + 2422783.

It is an arithmetic number, because the mean of its divisors is an integer number (462672000).

Almost surely, 2^38942189440 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 38942189440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59222016000).

38942189440 is an abundant number, since it is smaller than the sum of its proper divisors (79501842560).

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

38942189440 is a wasteful number, since it uses less digits than its factorization.

38942189440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16178 (or 16152 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The spelling of 38942189440 in words is "thirty-eight billion, nine hundred forty-two million, one hundred eighty-nine thousand, four hundred forty".