398900 has 18 divisors (see below), whose sum is σ = 865830. Its totient is φ = 159520.

The previous prime is 398887. The next prime is 398903. The reversal of 398900 is 9893.

It can be written as a sum of positive squares in 3 ways, for example, as 21904 + 376996 = 148^2 + 614^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398903) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1895 + ... + 2094.

2³⁹⁸⁹⁰⁰ is an apocalyptic number.

It is an amenable number.

398900 is an abundant number, since it is smaller than the sum of its proper divisors (466930).

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

398900 is a wasteful number, since it uses less digits than its factorization.

398900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4003 (or 3996 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 398900 is about 631.5853069855. The cubic root of 398900 is about 73.6130273884.

The spelling of 398900 in words is "three hundred ninety-eight thousand, nine hundred".