398445 has 16 divisors (see below), whose sum is σ = 646272. Its totient is φ = 209600.

The previous prime is 398441. The next prime is 398459. The reversal of 398445 is 544893.

It is not a de Polignac number, because 398445 - 2² = 398441 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (40392).

2³⁹⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

398445 is a deficient number, since it is larger than the sum of its proper divisors (247827).

398445 is a wasteful number, since it uses less digits than its factorization.

398445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372.

The product of its digits is 17280, while the sum is 33.

The square root of 398445 is about 631.2249995049. The cubic root of 398445 is about 73.5850281652.

The spelling of 398445 in words is "three hundred ninety-eight thousand, four hundred forty-five".