388931200085 has 4 divisors (see below), whose sum is σ = 466717440108. Its totient is φ = 311144960064.

The previous prime is 388931200067. The next prime is 388931200121. The reversal of 388931200085 is 580002139883.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112299382321 + 276631817764 = 335111^2 + 525958^2 .

It is a cyclic number.

It is not a de Polignac number, because 388931200085 - 2⁸ = 388931199829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 38893120004 + ... + 38893120013.

It is an arithmetic number, because the mean of its divisors is an integer number (116679360027).

Almost surely, 2^388931200085 is an apocalyptic number.

It is an amenable number.

388931200085 is a deficient number, since it is larger than the sum of its proper divisors (77786240023).

388931200085 is an equidigital number, since it uses as much as digits as its factorization.

388931200085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77786240022.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 388931200085 in words is "three hundred eighty-eight billion, nine hundred thirty-one million, two hundred thousand, eighty-five".