40400015 has 8 divisors (see below), whose sum is σ = 48980400. Its totient is φ = 31986432.

The previous prime is 40400011. The next prime is 40400021. The reversal of 40400015 is 51000404.

40400015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40400015 - 2² = 40400011 is a prime.

It is a super-2 number, since 2×40400015² = 3264322424000450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400011) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 41165 + ... + 42134.

It is an arithmetic number, because the mean of its divisors is an integer number (6122550).

Almost surely, 2^40400015 is an apocalyptic number.

40400015 is a deficient number, since it is larger than the sum of its proper divisors (8580385).

40400015 is an equidigital number, since it uses as much as digits as its factorization.

40400015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83401.

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 40400015 is about 6356.1006127971. The cubic root of 40400015 is about 343.1314367911.

Adding to 40400015 its reverse (51000404), we get a palindrome (91400419).

The spelling of 40400015 in words is "forty million, four hundred thousand, fifteen".