406478811 has 4 divisors (see below), whose sum is σ = 541971752. Its totient is φ = 270985872.

The previous prime is 406478801. The next prime is 406478833. The reversal of 406478811 is 118874604.

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

It is not a de Polignac number, because 406478811 - 2¹³ = 406470619 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 406478811.

It is not an unprimeable number, because it can be changed into a prime (406478801) 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, 67746466 + ... + 67746471.

It is an arithmetic number, because the mean of its divisors is an integer number (135492938).

Almost surely, 2^406478811 is an apocalyptic number.

406478811 is a deficient number, since it is larger than the sum of its proper divisors (135492941).

406478811 is a wasteful number, since it uses less digits than its factorization.

406478811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135492940.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 406478811 is about 20161.3196740690. The cubic root of 406478811 is about 740.7630375052.

The spelling of 406478811 in words is "four hundred six million, four hundred seventy-eight thousand, eight hundred eleven".