405600399 has 16 divisors (see below), whose sum is σ = 636236640. Its totient is φ = 254494080.

The previous prime is 405600389. The next prime is 405600421. The reversal of 405600399 is 993006504.

405600399 is a `hidden beast` number, since 4 + 0 + 560 + 0 + 3 + 99 = 666.

It is not a de Polignac number, because 405600399 - 2⁴ = 405600383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405600389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 441372 + ... + 442289.

It is an arithmetic number, because the mean of its divisors is an integer number (39764790).

Almost surely, 2^405600399 is an apocalyptic number.

405600399 is a deficient number, since it is larger than the sum of its proper divisors (230636241).

405600399 is a wasteful number, since it uses less digits than its factorization.

405600399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883687 (or 883681 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 405600399 is about 20139.5233061758. The cubic root of 405600399 is about 740.2290495000.

The spelling of 405600399 in words is "four hundred five million, six hundred thousand, three hundred ninety-nine".