405085899 has 16 divisors (see below), whose sum is σ = 547489152. Its totient is φ = 266380608.

The previous prime is 405085873. The next prime is 405085921. The reversal of 405085899 is 998580504.

It is a happy number.

It is not a de Polignac number, because 405085899 - 2²⁸ = 136650443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405085859) 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, 272412 + ... + 273894.

It is an arithmetic number, because the mean of its divisors is an integer number (34218072).

Almost surely, 2^405085899 is an apocalyptic number.

405085899 is a deficient number, since it is larger than the sum of its proper divisors (142403253).

405085899 is a wasteful number, since it uses less digits than its factorization.

405085899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666.

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 405085899 is about 20126.7458621606. The cubic root of 405085899 is about 739.9159260462.

The spelling of 405085899 in words is "four hundred five million, eighty-five thousand, eight hundred ninety-nine".