389914478257 has 8 divisors (see below), whose sum is σ = 392558884200. Its totient is φ = 387270439680.

The previous prime is 389914478251. The next prime is 389914478299. The reversal of 389914478257 is 752874419983.

It can be written as a sum of positive squares in 4 ways, for example, as 45936920241 + 343977558016 = 214329^2 + 586496^2 .

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 389914478257 - 2³ = 389914478249 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 389914478192 and 389914478201.

It is not an unprimeable number, because it can be changed into a prime (389914478251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2237593 + ... + 2405545.

It is an arithmetic number, because the mean of its divisors is an integer number (49069860525).

Almost surely, 2^389914478257 is an apocalyptic number.

It is an amenable number.

389914478257 is a deficient number, since it is larger than the sum of its proper divisors (2644405943).

389914478257 is a wasteful number, since it uses less digits than its factorization.

389914478257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183683.

The product of its digits is 121927680, while the sum is 67.

The spelling of 389914478257 in words is "three hundred eighty-nine billion, nine hundred fourteen million, four hundred seventy-eight thousand, two hundred fifty-seven".