38388521792 has 28 divisors (see below), whose sum is σ = 78236071620. Its totient is φ = 18675495936.

The previous prime is 38388521789. The next prime is 38388521807. The reversal of 38388521792 is 29712588383.

It can be written as a sum of positive squares in 2 ways, for example, as 18927155776 + 19461366016 = 137576^2 + 139504^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8103317 + ... + 8108052.

It is an arithmetic number, because the mean of its divisors is an integer number (2794145415).

Almost surely, 2^38388521792 is an apocalyptic number.

38388521792 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

38388521792 is an abundant number, since it is smaller than the sum of its proper divisors (39847549828).

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

38388521792 is a wasteful number, since it uses less digits than its factorization.

38388521792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16211418 (or 16211408 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 56.

The spelling of 38388521792 in words is "thirty-eight billion, three hundred eighty-eight million, five hundred twenty-one thousand, seven hundred ninety-two".