40442647 has 4 divisors (see below), whose sum is σ = 46220176. Its totient is φ = 34665120.

The previous prime is 40442639. The next prime is 40442653. The reversal of 40442647 is 74624404.

40442647 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.

It is not a de Polignac number, because 40442647 - 2³ = 40442639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40442627) 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, 2888754 + ... + 2888767.

It is an arithmetic number, because the mean of its divisors is an integer number (11555044).

Almost surely, 2^40442647 is an apocalyptic number.

40442647 is a deficient number, since it is larger than the sum of its proper divisors (5777529).

40442647 is an equidigital number, since it uses as much as digits as its factorization.

40442647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777528.

The product of its (nonzero) digits is 21504, while the sum is 31.

The square root of 40442647 is about 6359.4533570111. The cubic root of 40442647 is about 343.2520905162.

The spelling of 40442647 in words is "forty million, four hundred forty-two thousand, six hundred forty-seven".