408493 has 4 divisors (see below), whose sum is σ = 432540. Its totient is φ = 384448.

The previous prime is 408491. The next prime is 408497. The reversal of 408493 is 394804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 381924 + 26569 = 618^2 + 163^2 .

It is a cyclic number.

It is not a de Polignac number, because 408493 - 2¹ = 408491 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11998 + ... + 12031.

It is an arithmetic number, because the mean of its divisors is an integer number (108135).

2⁴⁰⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

408493 is a deficient number, since it is larger than the sum of its proper divisors (24047).

408493 is a wasteful number, since it uses less digits than its factorization.

408493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24046.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 408493 is about 639.1345711194. The cubic root of 408493 is about 74.1984568231.

Subtracting from 408493 its reverse (394804), we obtain a square (13689 = 117²).

The spelling of 408493 in words is "four hundred eight thousand, four hundred ninety-three".