40402439 has 8 divisors (see below), whose sum is σ = 50371968. Its totient is φ = 31482360.

The previous prime is 40402403. The next prime is 40402441. The reversal of 40402439 is 93420404.

40402439 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 not a de Polignac number, because 40402439 - 2²⁰ = 39353863 is a prime.

It is a Duffinian number.

40402439 is a modest number, since divided by 2439 gives 404 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40402459) 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, 262277 + ... + 262430.

It is an arithmetic number, because the mean of its divisors is an integer number (6296496).

Almost surely, 2^40402439 is an apocalyptic number.

40402439 is a deficient number, since it is larger than the sum of its proper divisors (9969529).

40402439 is a wasteful number, since it uses less digits than its factorization.

40402439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524725.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40402439 is about 6356.2912928846. The cubic root of 40402439 is about 343.1382992800.

The spelling of 40402439 in words is "forty million, four hundred two thousand, four hundred thirty-nine".