405399 has 8 divisors (see below), whose sum is σ = 572400. Its totient is φ = 254336.

The previous prime is 405373. The next prime is 405401. The reversal of 405399 is 993504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405399 - 2⁸ = 405143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405199) 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, 3924 + ... + 4025.

It is an arithmetic number, because the mean of its divisors is an integer number (71550).

2⁴⁰⁵³⁹⁹ is an apocalyptic number.

405399 is a deficient number, since it is larger than the sum of its proper divisors (167001).

405399 is a wasteful number, since it uses less digits than its factorization.

405399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7969.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 405399 is about 636.7095099023. The cubic root of 405399 is about 74.0106510113.

The spelling of 405399 in words is "four hundred five thousand, three hundred ninety-nine".