406818311 has 4 divisors (see below), whose sum is σ = 409512624. Its totient is φ = 404124000.

The previous prime is 406818299. The next prime is 406818337. The reversal of 406818311 is 113818604.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406818311 is a prime.

It is a super-2 number, since 2×406818311² = 331002276329785442, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406818341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1346930 + ... + 1347231.

It is an arithmetic number, because the mean of its divisors is an integer number (102378156).

Almost surely, 2^406818311 is an apocalyptic number.

406818311 is a deficient number, since it is larger than the sum of its proper divisors (2694313).

406818311 is a wasteful number, since it uses less digits than its factorization.

406818311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694312.

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 406818311 is about 20169.7375044892. The cubic root of 406818311 is about 740.9692139491.

The spelling of 406818311 in words is "four hundred six million, eight hundred eighteen thousand, three hundred eleven".