38021790720 has 264 divisors, whose sum is σ = 128366452944. Its totient is φ = 9604104192.

The previous prime is 38021790619. The next prime is 38021790731. The reversal of 38021790720 is 2709712083.

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, 5541532 + ... + 5548388.

Almost surely, 2^38021790720 is an apocalyptic number.

38021790720 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38021790720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64183226472).

38021790720 is an abundant number, since it is smaller than the sum of its proper divisors (90344662224).

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

38021790720 is a wasteful number, since it uses less digits than its factorization.

38021790720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6923 (or 6886 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 39.

The spelling of 38021790720 in words is "thirty-eight billion, twenty-one million, seven hundred ninety thousand, seven hundred twenty".