38391777792 has 320 divisors, whose sum is σ = 119271651840. Its totient is φ = 12178833408.

The previous prime is 38391777761. The next prime is 38391777797. The reversal of 38391777792 is 29777719383.

It is not an unprimeable number, because it can be changed into a prime (38391777797) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24039138 + ... + 24040734.

It is an arithmetic number, because the mean of its divisors is an integer number (372723912).

Almost surely, 2^38391777792 is an apocalyptic number.

38391777792 is a gapful number since it is divisible by the number (32) 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 38391777792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59635825920).

38391777792 is an abundant number, since it is smaller than the sum of its proper divisors (80879874048).

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

38391777792 is a wasteful number, since it uses less digits than its factorization.

38391777792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708 (or 1686 counting only the distinct ones).

The product of its digits is 28005264, while the sum is 63.

The spelling of 38391777792 in words is "thirty-eight billion, three hundred ninety-one million, seven hundred seventy-seven thousand, seven hundred ninety-two".