398768925 has 24 divisors (see below), whose sum is σ = 669146656. Its totient is φ = 209499840.

The previous prime is 398768897. The next prime is 398768927. The reversal of 398768925 is 529867893.

It is not a de Polignac number, because 398768925 - 2⁵ = 398768893 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398768927) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 34654 + ... + 44703.

Almost surely, 2^398768925 is an apocalyptic number.

It is an amenable number.

398768925 is a deficient number, since it is larger than the sum of its proper divisors (270377731).

398768925 is a wasteful number, since it uses less digits than its factorization.

398768925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79437 (or 79432 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 57.

The square root of 398768925 is about 19969.1994080884. The cubic root of 398768925 is about 736.0496364258.

The spelling of 398768925 in words is "three hundred ninety-eight million, seven hundred sixty-eight thousand, nine hundred twenty-five".