238720333857 has 16 divisors (see below), whose sum is σ = 319584471168. Its totient is φ = 158502643200.

The previous prime is 238720333849. The next prime is 238720333867. The reversal of 238720333857 is 758333027832.

238720333857 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 238720333857 - 2³ = 238720333849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (238720333867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734607 + ... + 1008507.

It is an arithmetic number, because the mean of its divisors is an integer number (19974029448).

Almost surely, 2^238720333857 is an apocalyptic number.

It is an amenable number.

238720333857 is a deficient number, since it is larger than the sum of its proper divisors (80864137311).

238720333857 is a wasteful number, since it uses less digits than its factorization.

238720333857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275080.

The product of its (nonzero) digits is 5080320, while the sum is 51.

The spelling of 238720333857 in words is "two hundred thirty-eight billion, seven hundred twenty million, three hundred thirty-three thousand, eight hundred fifty-seven".