388942494721 has 8 divisors (see below), whose sum is σ = 426671301600. Its totient is φ = 351608754240.

The previous prime is 388942494719. The next prime is 388942494737. The reversal of 388942494721 is 127494249883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 388942494721 - 2¹ = 388942494719 is a prime.

It is a super-2 number, since 2×388942494721² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 388942494721.

It is not an unprimeable number, because it can be changed into a prime (388942494781) 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 7 ways as a sum of consecutive naturals, for example, 98764536 + ... + 98768473.

It is an arithmetic number, because the mean of its divisors is an integer number (53333912700).

Almost surely, 2^388942494721 is an apocalyptic number.

It is an amenable number.

388942494721 is a deficient number, since it is larger than the sum of its proper divisors (37728806879).

388942494721 is a wasteful number, since it uses less digits than its factorization.

388942494721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197533199.

The product of its digits is 27869184, while the sum is 61.

The spelling of 388942494721 in words is "three hundred eighty-eight billion, nine hundred forty-two million, four hundred ninety-four thousand, seven hundred twenty-one".