38721013280 has 24 divisors (see below), whose sum is σ = 91478394252. Its totient is φ = 15488405248.

The previous prime is 38721013267. The next prime is 38721013343. The reversal of 38721013280 is 8231012783.

It can be written as a sum of positive squares in 2 ways, for example, as 38587102096 + 133911184 = 196436^2 + 11572^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 38721013280.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121003007 + ... + 121003326.

Almost surely, 2^38721013280 is an apocalyptic number.

It is an amenable number.

38721013280 is an abundant number, since it is smaller than the sum of its proper divisors (52757380972).

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

38721013280 is a wasteful number, since it uses less digits than its factorization.

38721013280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242006348 (or 242006340 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 38721013280 in words is "thirty-eight billion, seven hundred twenty-one million, thirteen thousand, two hundred eighty".