398225 has 12 divisors (see below), whose sum is σ = 523404. Its totient is φ = 299520.

The previous prime is 398219. The next prime is 398227. The reversal of 398225 is 522893.

It can be written as a sum of positive squares in 6 ways, for example, as 28561 + 369664 = 169^2 + 608^2 .

It is not a de Polignac number, because 398225 - 2¹² = 394129 is a prime.

It is a d-powerful number, because it can be written as 3 + 9⁴ + 2² + 8 + 2¹⁰ + 5⁸ .

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (398227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44 + ... + 893.

It is an arithmetic number, because the mean of its divisors is an integer number (43617).

2³⁹⁸²²⁵ is an apocalyptic number.

It is an amenable number.

398225 is a deficient number, since it is larger than the sum of its proper divisors (125179).

398225 is a wasteful number, since it uses less digits than its factorization.

398225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964 (or 959 counting only the distinct ones).

The product of its digits is 4320, while the sum is 29.

The square root of 398225 is about 631.0507111160. The cubic root of 398225 is about 73.5714824340.

The spelling of 398225 in words is "three hundred ninety-eight thousand, two hundred twenty-five".