40011405 has 16 divisors (see below), whose sum is σ = 73163904. Its totient is φ = 18290880.

The previous prime is 40011401. The next prime is 40011407. The reversal of 40011405 is 50411004.

It is not a de Polignac number, because 40011405 - 2² = 40011401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40011401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 190426 + ... + 190635.

It is an arithmetic number, because the mean of its divisors is an integer number (4572744).

Almost surely, 2^40011405 is an apocalyptic number.

It is an amenable number.

40011405 is a deficient number, since it is larger than the sum of its proper divisors (33152499).

40011405 is a wasteful number, since it uses less digits than its factorization.

40011405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381076.

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

The square root of 40011405 is about 6325.4569004934. The cubic root of 40011405 is about 342.0276900394.

Adding to 40011405 its reverse (50411004), we get a palindrome (90422409).

The spelling of 40011405 in words is "forty million, eleven thousand, four hundred five".