40542439 has 8 divisors (see below), whose sum is σ = 46470528. Its totient is φ = 34648440.

The previous prime is 40542431. The next prime is 40542457. The reversal of 40542439 is 93424504.

It is a happy number.

40542439 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 40542439 - 2³ = 40542431 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40542439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40542431) 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, 5917 + ... + 10774.

It is an arithmetic number, because the mean of its divisors is an integer number (5808816).

Almost surely, 2^40542439 is an apocalyptic number.

40542439 is a deficient number, since it is larger than the sum of its proper divisors (5928089).

40542439 is a wasteful number, since it uses less digits than its factorization.

40542439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17045.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 40542439 is about 6367.2944803896. The cubic root of 40542439 is about 343.5341828125.

The spelling of 40542439 in words is "forty million, five hundred forty-two thousand, four hundred thirty-nine".