40013405 has 16 divisors (see below), whose sum is σ = 50317824. Its totient is φ = 30507840.

The previous prime is 40013371. The next prime is 40013419. The reversal of 40013405 is 50431004.

40013405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40013405 - 2⁶ = 40013341 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8459 + ... + 12311.

It is an arithmetic number, because the mean of its divisors is an integer number (3144864).

Almost surely, 2^40013405 is an apocalyptic number.

It is an amenable number.

40013405 is a deficient number, since it is larger than the sum of its proper divisors (10304419).

40013405 is a wasteful number, since it uses less digits than its factorization.

40013405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40013405 is about 6325.6149898646. The cubic root of 40013405 is about 342.0333887811.

Adding to 40013405 its reverse (50431004), we get a palindrome (90444409).

The spelling of 40013405 in words is "forty million, thirteen thousand, four hundred five".