398129925 has 24 divisors (see below), whose sum is σ = 660895200. Its totient is φ = 211480000.

The previous prime is 398129899. The next prime is 398129939. The reversal of 398129925 is 529921893.

It is not a de Polignac number, because 398129925 - 2²¹ = 396032773 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8251 + ... + 29399.

It is an arithmetic number, because the mean of its divisors is an integer number (27537300).

Almost surely, 2^398129925 is an apocalyptic number.

It is an amenable number.

398129925 is a deficient number, since it is larger than the sum of its proper divisors (262765275).

398129925 is a wasteful number, since it uses less digits than its factorization.

398129925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21413 (or 21408 counting only the distinct ones).

The product of its digits is 349920, while the sum is 48.

The square root of 398129925 is about 19953.1933534460. The cubic root of 398129925 is about 735.6562697924.

The spelling of 398129925 in words is "three hundred ninety-eight million, one hundred twenty-nine thousand, nine hundred twenty-five".