38721720222 has 32 divisors (see below), whose sum is σ = 86060935200. Its totient is φ = 12905339904.

The previous prime is 38721720221. The next prime is 38721720227. The reversal of 38721720222 is 22202712783.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38721720221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344904 + ... + 443172.

It is an arithmetic number, because the mean of its divisors is an integer number (2689404225).

Almost surely, 2^38721720222 is an apocalyptic number.

38721720222 is an abundant number, since it is smaller than the sum of its proper divisors (47339214978).

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

38721720222 is a wasteful number, since it uses less digits than its factorization.

38721720222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105577 (or 105571 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 38721720222 in words is "thirty-eight billion, seven hundred twenty-one million, seven hundred twenty thousand, two hundred twenty-two".