389512705 has 32 divisors (see below), whose sum is σ = 502723584. Its totient is φ = 289012416.

The previous prime is 389512703. The next prime is 389512709. The reversal of 389512705 is 507215983.

It is a cyclic number.

It is not a de Polignac number, because 389512705 - 2¹ = 389512703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (389512703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1122342 + ... + 1122688.

It is an arithmetic number, because the mean of its divisors is an integer number (15710112).

Almost surely, 2^389512705 is an apocalyptic number.

It is an amenable number.

389512705 is a deficient number, since it is larger than the sum of its proper divisors (113210879).

389512705 is a wasteful number, since it uses less digits than its factorization.

389512705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645.

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 389512705 is about 19736.0762311053. The cubic root of 389512705 is about 730.3099359468.

The spelling of 389512705 in words is "three hundred eighty-nine million, five hundred twelve thousand, seven hundred five".