398255 has 16 divisors (see below), whose sum is σ = 562464. Its totient is φ = 266880.

The previous prime is 398249. The next prime is 398261. The reversal of 398255 is 552893.

398255 = T₂₄₁ + T₂₄₂ + ... + T₂₅₃.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (398249) and next prime (398261).

It is not a de Polignac number, because 398255 - 2¹⁸ = 136111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398255.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 437 + ... + 993.

It is an arithmetic number, because the mean of its divisors is an integer number (35154).

2³⁹⁸²⁵⁵ is an apocalyptic number.

398255 is a deficient number, since it is larger than the sum of its proper divisors (164209).

398255 is a wasteful number, since it uses less digits than its factorization.

398255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586.

The product of its digits is 10800, while the sum is 32.

The square root of 398255 is about 631.0744805488. The cubic root of 398255 is about 73.5733298729.

The spelling of 398255 in words is "three hundred ninety-eight thousand, two hundred fifty-five".