398493 has 8 divisors (see below), whose sum is σ = 590400. Its totient is φ = 265644.

The previous prime is 398491. The next prime is 398509. The reversal of 398493 is 394893.

It is not a de Polignac number, because 398493 - 2¹ = 398491 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7353 + ... + 7406.

It is an arithmetic number, because the mean of its divisors is an integer number (73800).

2³⁹⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

398493 is a deficient number, since it is larger than the sum of its proper divisors (191907).

398493 is a wasteful number, since it uses less digits than its factorization.

398493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14768 (or 14762 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 398493 is about 631.2630196677. The cubic root of 398493 is about 73.5879829348.

Adding to 398493 its product of digits (23328), we get a triangular number (421821 = T₉₁₈).

Subtracting from 398493 its reverse (394893), we obtain a square (3600 = 60²).

The spelling of 398493 in words is "three hundred ninety-eight thousand, four hundred ninety-three".