398925 has 30 divisors (see below), whose sum is σ = 742698. Its totient is φ = 211680.

The previous prime is 398921. The next prime is 398933. The reversal of 398925 is 529893.

398925 = T₁₆₆ + T₁₆₇ + ... + T₁₉₀.

It can be written as a sum of positive squares in 3 ways, for example, as 116964 + 281961 = 342^2 + 531^2 .

It is not a de Polignac number, because 398925 - 2² = 398921 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 398925.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398925.

It is not an unprimeable number, because it can be changed into a prime (398921) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 1927 + ... + 2123.

2³⁹⁸⁹²⁵ is an apocalyptic number.

It is an amenable number.

398925 is a deficient number, since it is larger than the sum of its proper divisors (343773).

398925 is a wasteful number, since it uses less digits than its factorization.

398925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 205 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 398925 is about 631.6050981428. The cubic root of 398925 is about 73.6145651900.

The spelling of 398925 in words is "three hundred ninety-eight thousand, nine hundred twenty-five".