405992 has 16 divisors (see below), whose sum is σ = 801600. Its totient is φ = 192240.

The previous prime is 405991. The next prime is 405997. The reversal of 405992 is 299504.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405992.

It is not an unprimeable number, because it can be changed into a prime (405991) 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, 1184 + ... + 1487.

It is an arithmetic number, because the mean of its divisors is an integer number (50100).

2⁴⁰⁵⁹⁹² is an apocalyptic number.

It is an amenable number.

405992 is a deficient number, since it is larger than the sum of its proper divisors (395608).

405992 is a wasteful number, since it uses less digits than its factorization.

405992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2696 (or 2692 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 405992 is about 637.1750152038. The cubic root of 405992 is about 74.0467199493.

The spelling of 405992 in words is "four hundred five thousand, nine hundred ninety-two".