398172 has 12 divisors (see below), whose sum is σ = 929096. Its totient is φ = 132720.

The previous prime is 398171. The next prime is 398207. The reversal of 398172 is 271893.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16579 + ... + 16602.

2³⁹⁸¹⁷² is an apocalyptic number.

It is an amenable number.

398172 is an abundant number, since it is smaller than the sum of its proper divisors (530924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398172 is a wasteful number, since it uses less digits than its factorization.

398172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33188 (or 33186 counting only the distinct ones).

The product of its digits is 3024, while the sum is 30.

The square root of 398172 is about 631.0087162631. The cubic root of 398172 is about 73.5682183985.

The spelling of 398172 in words is "three hundred ninety-eight thousand, one hundred seventy-two".