389664425 has 6 divisors (see below), whose sum is σ = 483183918. Its totient is φ = 311731520.

The previous prime is 389664343. The next prime is 389664439. The reversal of 389664425 is 524466983.

It can be written as a sum of positive squares in 3 ways, for example, as 3463321 + 386201104 = 1861^2 + 19652^2 .

It is not a de Polignac number, because 389664425 - 2¹² = 389660329 is a prime.

It is a super-2 number, since 2×389664425² = 303676728221161250, which 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 389664425.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7793264 + ... + 7793313.

It is an arithmetic number, because the mean of its divisors is an integer number (80530653).

Almost surely, 2^389664425 is an apocalyptic number.

It is an amenable number.

389664425 is a deficient number, since it is larger than the sum of its proper divisors (93519493).

389664425 is a wasteful number, since it uses less digits than its factorization.

389664425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15586587 (or 15586582 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 389664425 is about 19739.9195793701. The cubic root of 389664425 is about 730.4047452122.

The spelling of 389664425 in words is "three hundred eighty-nine million, six hundred sixty-four thousand, four hundred twenty-five".