40638417 has 4 divisors (see below), whose sum is σ = 54184560. Its totient is φ = 27092276.

The previous prime is 40638413. The next prime is 40638463. The reversal of 40638417 is 71483604.

40638417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40638417 - 2² = 40638413 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40638413) 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 3 ways as a sum of consecutive naturals, for example, 6773067 + ... + 6773072.

It is an arithmetic number, because the mean of its divisors is an integer number (13546140).

Almost surely, 2^40638417 is an apocalyptic number.

It is an amenable number.

40638417 is a deficient number, since it is larger than the sum of its proper divisors (13546143).

40638417 is a wasteful number, since it uses less digits than its factorization.

40638417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13546142.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 40638417 is about 6374.8268211772. The cubic root of 40638417 is about 343.8050573189.

The spelling of 40638417 in words is "forty million, six hundred thirty-eight thousand, four hundred seventeen".