398055 has 32 divisors (see below), whose sum is σ = 774144. Its totient is φ = 170496.

The previous prime is 398053. The next prime is 398059. The reversal of 398055 is 550893.

It is not a de Polignac number, because 398055 - 2¹ = 398053 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398053) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1674 + ... + 1896.

It is an arithmetic number, because the mean of its divisors is an integer number (24192).

2³⁹⁸⁰⁵⁵ is an apocalyptic number.

398055 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

398055 is a deficient number, since it is larger than the sum of its proper divisors (376089).

398055 is a wasteful number, since it uses less digits than its factorization.

398055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 398055 is about 630.9160007481. The cubic root of 398055 is about 73.5610118607.

The spelling of 398055 in words is "three hundred ninety-eight thousand, fifty-five".