38720310785 has 24 divisors (see below), whose sum is σ = 50337919800. Its totient is φ = 28579579392.

The previous prime is 38720310751. The next prime is 38720310791. The reversal of 38720310785 is 58701302783.

It can be written as a sum of positive squares in 12 ways, for example, as 30625350001 + 8094960784 = 175001^2 + 89972^2 .

It is not a de Polignac number, because 38720310785 - 2¹² = 38720306689 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 1930991 + ... + 1950939.

It is an arithmetic number, because the mean of its divisors is an integer number (2097413325).

Almost surely, 2^38720310785 is an apocalyptic number.

It is an amenable number.

38720310785 is a deficient number, since it is larger than the sum of its proper divisors (11617609015).

38720310785 is a wasteful number, since it uses less digits than its factorization.

38720310785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22277 (or 22264 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The spelling of 38720310785 in words is "thirty-eight billion, seven hundred twenty million, three hundred ten thousand, seven hundred eighty-five".