40405011 has 4 divisors (see below), whose sum is σ = 53873352. Its totient is φ = 26936672.

The previous prime is 40405009. The next prime is 40405037. The reversal of 40405011 is 11050404.

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 40405011 - 2¹ = 40405009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40405051) 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, 6734166 + ... + 6734171.

It is an arithmetic number, because the mean of its divisors is an integer number (13468338).

Almost surely, 2^40405011 is an apocalyptic number.

40405011 is a deficient number, since it is larger than the sum of its proper divisors (13468341).

40405011 is a wasteful number, since it uses less digits than its factorization.

40405011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13468340.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 40405011 is about 6356.4936089011. The cubic root of 40405011 is about 343.1455804657.

Adding to 40405011 its reverse (11050404), we get a palindrome (51455415).

The spelling of 40405011 in words is "forty million, four hundred five thousand, eleven".