405263406 has 16 divisors (see below), whose sum is σ = 811626624. Its totient is φ = 134904504.

The previous prime is 405263363. The next prime is 405263413. The reversal of 405263406 is 604362504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40996 + ... + 49911.

It is an arithmetic number, because the mean of its divisors is an integer number (50726664).

Almost surely, 2^405263406 is an apocalyptic number.

405263406 is an abundant number, since it is smaller than the sum of its proper divisors (406363218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

405263406 is a wasteful number, since it uses less digits than its factorization.

405263406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91655.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 405263406 is about 20131.1551084383. The cubic root of 405263406 is about 740.0239863177.

The spelling of 405263406 in words is "four hundred five million, two hundred sixty-three thousand, four hundred six".