38312222720 has 112 divisors (see below), whose sum is σ = 97353946008. Its totient is φ = 14423162880.

The previous prime is 38312222701. The next prime is 38312222749. The reversal of 38312222720 is 2722221383.

It can be written as a sum of positive squares in 4 ways, for example, as 31632756736 + 6679465984 = 177856^2 + 81728^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 668810 + ... + 723830.

Almost surely, 2^38312222720 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 38312222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48676973004).

38312222720 is an abundant number, since it is smaller than the sum of its proper divisors (59041723288).

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

38312222720 is an equidigital number, since it uses as much as digits as its factorization.

38312222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55069 (or 55045 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The spelling of 38312222720 in words is "thirty-eight billion, three hundred twelve million, two hundred twenty-two thousand, seven hundred twenty".