405944855 has 4 divisors (see below), whose sum is σ = 487133832. Its totient is φ = 324755880.

The previous prime is 405944827. The next prime is 405944857. The reversal of 405944855 is 558449504.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 405944855 - 2⁸ = 405944599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405944857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40594481 + ... + 40594490.

It is an arithmetic number, because the mean of its divisors is an integer number (121783458).

Almost surely, 2^405944855 is an apocalyptic number.

405944855 is a deficient number, since it is larger than the sum of its proper divisors (81188977).

405944855 is an equidigital number, since it uses as much as digits as its factorization.

405944855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81188976.

The product of its (nonzero) digits is 576000, while the sum is 44.

The square root of 405944855 is about 20148.0732329422. The cubic root of 405944855 is about 740.4385366312.

The spelling of 405944855 in words is "four hundred five million, nine hundred forty-four thousand, eight hundred fifty-five".