40047447 has 16 divisors (see below), whose sum is σ = 59673600. Its totient is φ = 23678400.

The previous prime is 40047437. The next prime is 40047451. The reversal of 40047447 is 74474004.

40047447 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 40047447 - 2¹⁰ = 40046423 is a prime.

It is a super-2 number, since 2×40047447² = 3207596022435618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40047437) 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 15 ways as a sum of consecutive naturals, for example, 13447 + ... + 16152.

It is an arithmetic number, because the mean of its divisors is an integer number (3729600).

Almost surely, 2^40047447 is an apocalyptic number.

40047447 is a deficient number, since it is larger than the sum of its proper divisors (19626153).

40047447 is a wasteful number, since it uses less digits than its factorization.

40047447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29654.

The product of its (nonzero) digits is 12544, while the sum is 30.

The square root of 40047447 is about 6328.3052233596. The cubic root of 40047447 is about 342.1303579528.

The spelling of 40047447 in words is "forty million, forty-seven thousand, four hundred forty-seven".