40439623 has 4 divisors (see below), whose sum is σ = 46216720. Its totient is φ = 34662528.

The previous prime is 40439621. The next prime is 40439629. The reversal of 40439623 is 32693404.

40439623 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 a cyclic number.

It is not a de Polignac number, because 40439623 - 2¹ = 40439621 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 (40439621) 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, 2888538 + ... + 2888551.

It is an arithmetic number, because the mean of its divisors is an integer number (11554180).

Almost surely, 2^40439623 is an apocalyptic number.

40439623 is a deficient number, since it is larger than the sum of its proper divisors (5777097).

40439623 is an equidigital number, since it uses as much as digits as its factorization.

40439623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5777096.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 40439623 is about 6359.2155962823. The cubic root of 40439623 is about 343.2435350245.

The spelling of 40439623 in words is "forty million, four hundred thirty-nine thousand, six hundred twenty-three".