74438439 has 8 divisors (see below), whose sum is σ = 99411072. Its totient is φ = 49545720.

The previous prime is 74438423. The next prime is 74438449. The reversal of 74438439 is 93483447.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74438439 - 2⁴ = 74438423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74438439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74438449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17769 + ... + 21554.

It is an arithmetic number, because the mean of its divisors is an integer number (12426384).

Almost surely, 2^74438439 is an apocalyptic number.

74438439 is a deficient number, since it is larger than the sum of its proper divisors (24972633).

74438439 is a wasteful number, since it uses less digits than its factorization.

74438439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39957.

The product of its digits is 290304, while the sum is 42.

The square root of 74438439 is about 8627.7713808376. The cubic root of 74438439 is about 420.6611638653.

The spelling of 74438439 in words is "seventy-four million, four hundred thirty-eight thousand, four hundred thirty-nine".