38320805820 has 96 divisors (see below), whose sum is σ = 117196531200. Its totient is φ = 9278472960.

The previous prime is 38320805749. The next prime is 38320805843. The reversal of 38320805820 is 2850802383.

38320805820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 507906 + ... + 578454.

It is an arithmetic number, because the mean of its divisors is an integer number (1220797200).

Almost surely, 2^38320805820 is an apocalyptic number.

38320805820 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 38320805820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58598265600).

38320805820 is an abundant number, since it is smaller than the sum of its proper divisors (78875725380).

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

38320805820 is a wasteful number, since it uses less digits than its factorization.

38320805820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71395 (or 71393 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 38320805820 in words is "thirty-eight billion, three hundred twenty million, eight hundred five thousand, eight hundred twenty".