405399855 has 32 divisors (see below), whose sum is σ = 743040000. Its totient is φ = 184891392.

The previous prime is 405399853. The next prime is 405399857. The reversal of 405399855 is 558993504.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (405399853) and next prime (405399857).

It is not a de Polignac number, because 405399855 - 2¹ = 405399853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405399853) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42846 + ... + 51444.

It is an arithmetic number, because the mean of its divisors is an integer number (23220000).

Almost surely, 2^405399855 is an apocalyptic number.

405399855 is a deficient number, since it is larger than the sum of its proper divisors (337640145).

405399855 is a wasteful number, since it uses less digits than its factorization.

405399855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9063.

The product of its (nonzero) digits is 972000, while the sum is 48.

The square root of 405399855 is about 20134.5438239857. The cubic root of 405399855 is about 740.1070304161.

The spelling of 405399855 in words is "four hundred five million, three hundred ninety-nine thousand, eight hundred fifty-five".