405390 has 16 divisors (see below), whose sum is σ = 973008. Its totient is φ = 108096.

The previous prime is 405373. The next prime is 405401. The reversal of 405390 is 93504.

405390 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 13.

It is a congruent number.

It is an unprimeable number.

405390 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 7 ways as a sum of consecutive naturals, for example, 6727 + ... + 6786.

It is an arithmetic number, because the mean of its divisors is an integer number (60813).

2⁴⁰⁵³⁹⁰ is an apocalyptic number.

405390 is an abundant number, since it is smaller than the sum of its proper divisors (567618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405390 is a wasteful number, since it uses less digits than its factorization.

405390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13523.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 405390 is about 636.7024422758. The cubic root of 405390 is about 74.0101033198.

Adding to 405390 its reverse (93504), we get a palindrome (498894).

The spelling of 405390 in words is "four hundred five thousand, three hundred ninety".