405256406 has 8 divisors (see below), whose sum is σ = 608175480. Its totient is φ = 202531248.

The previous prime is 405256393. The next prime is 405256417. The reversal of 405256406 is 604652504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43136 + ... + 51683.

It is an arithmetic number, because the mean of its divisors is an integer number (76021935).

Almost surely, 2^405256406 is an apocalyptic number.

405256406 is a deficient number, since it is larger than the sum of its proper divisors (202919074).

405256406 is a wasteful number, since it uses less digits than its factorization.

405256406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96958.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 405256406 is about 20130.9812478180. The cubic root of 405256406 is about 740.0197255516.

The spelling of 405256406 in words is "four hundred five million, two hundred fifty-six thousand, four hundred six".