38885731992 has 128 divisors (see below), whose sum is σ = 109267833600. Its totient is φ = 12812235264.

The previous prime is 38885731979. The next prime is 38885732009. The reversal of 38885731992 is 29913758883.

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, 12085968 + ... + 12089184.

It is an arithmetic number, because the mean of its divisors is an integer number (853654950).

Almost surely, 2^38885731992 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 38885731992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54633916800).

38885731992 is an abundant number, since it is smaller than the sum of its proper divisors (70382101608).

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

38885731992 is a wasteful number, since it uses less digits than its factorization.

38885731992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3862 (or 3852 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 38885731992 in words is "thirty-eight billion, eight hundred eighty-five million, seven hundred thirty-one thousand, nine hundred ninety-two".