405492 has 12 divisors (see below), whose sum is σ = 946176. Its totient is φ = 135160.

The previous prime is 405491. The next prime is 405497. The reversal of 405492 is 294504.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405491) 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, 16884 + ... + 16907.

It is an arithmetic number, because the mean of its divisors is an integer number (78848).

2⁴⁰⁵⁴⁹² is an apocalyptic number.

It is an amenable number.

405492 is an abundant number, since it is smaller than the sum of its proper divisors (540684).

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

405492 is a wasteful number, since it uses less digits than its factorization.

405492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33798 (or 33796 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 405492 is about 636.7825374490. The cubic root of 405492 is about 74.0163100158.

Adding to 405492 its reverse (294504), we get a palindrome (699996).

The spelling of 405492 in words is "four hundred five thousand, four hundred ninety-two".