398403 has 6 divisors (see below), whose sum is σ = 575484. Its totient is φ = 265596.

The previous prime is 398393. The next prime is 398407. The reversal of 398403 is 304893.

It is not a de Polignac number, because 398403 - 2⁶ = 398339 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398403.

It is not an unprimeable number, because it can be changed into a prime (398407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22125 + ... + 22142.

It is an arithmetic number, because the mean of its divisors is an integer number (95914).

2³⁹⁸⁴⁰³ is an apocalyptic number.

398403 is a deficient number, since it is larger than the sum of its proper divisors (177081).

398403 is a wasteful number, since it uses less digits than its factorization.

398403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44273 (or 44270 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 398403 is about 631.1917299838. The cubic root of 398403 is about 73.5824425472.

The spelling of 398403 in words is "three hundred ninety-eight thousand, four hundred three".