40805911 has 4 divisors (see below), whose sum is σ = 40864824. Its totient is φ = 40747000.

The previous prime is 40805893. The next prime is 40805953. The reversal of 40805911 is 11950804.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40805911 - 2¹⁵ = 40773143 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 40805911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40805981) 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, 28405 + ... + 29806.

It is an arithmetic number, because the mean of its divisors is an integer number (10216206).

Almost surely, 2^40805911 is an apocalyptic number.

40805911 is a deficient number, since it is larger than the sum of its proper divisors (58913).

40805911 is an equidigital number, since it uses as much as digits as its factorization.

40805911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58912.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 40805911 is about 6387.9504537841. The cubic root of 40805911 is about 344.2767485189.

The spelling of 40805911 in words is "forty million, eight hundred five thousand, nine hundred eleven".