389865025 has 27 divisors (see below), whose sum is σ = 532860643. Its totient is φ = 282748400.

The previous prime is 389865001. The next prime is 389865037. The reversal of 389865025 is 520568983.

The square root of 389865025 is 19745.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 140351409 + 249513616 = 11847^2 + 15796^2 .

It is not a de Polignac number, because 389865025 - 2¹³ = 389856833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1085796 + ... + 1086154.

Almost surely, 2^389865025 is an apocalyptic number.

389865025 is the 19745-th square number.

389865025 is the 9873-rd centered octagonal number.

It is an amenable number.

389865025 is a deficient number, since it is larger than the sum of its proper divisors (142995618).

389865025 is an equidigital number, since it uses as much as digits as its factorization.

389865025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 46.

The cubic root of 389865025 is about 730.5300616357.

Multiplying 389865025 by its product of nonzero digits (518400), we get a square (202106028960000 = 14216400²).

The spelling of 389865025 in words is "three hundred eighty-nine million, eight hundred sixty-five thousand, twenty-five".