406505611 has 8 divisors (see below), whose sum is σ = 434526624. Its totient is φ = 379346880.

The previous prime is 406505587. The next prime is 406505621. The reversal of 406505611 is 116505604.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406505611 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406505611.

It is not an unprimeable number, because it can be changed into a prime (406505621) 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 7 ways as a sum of consecutive naturals, for example, 214596 + ... + 216481.

It is an arithmetic number, because the mean of its divisors is an integer number (54315828).

Almost surely, 2^406505611 is an apocalyptic number.

406505611 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

406505611 is a deficient number, since it is larger than the sum of its proper divisors (28021013).

406505611 is a wasteful number, since it uses less digits than its factorization.

406505611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431141.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 406505611 is about 20161.9843021465. The cubic root of 406505611 is about 740.7793171673.

The spelling of 406505611 in words is "four hundred six million, five hundred five thousand, six hundred eleven".