74243439 has 16 divisors (see below), whose sum is σ = 110246400. Its totient is φ = 49380408.

The previous prime is 74243399. The next prime is 74243443. The reversal of 74243439 is 93434247.

It is not a de Polignac number, because 74243439 - 2¹³ = 74235247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74241439) 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 15 ways as a sum of consecutive naturals, for example, 9532 + ... + 15470.

It is an arithmetic number, because the mean of its divisors is an integer number (6890400).

Almost surely, 2^74243439 is an apocalyptic number.

74243439 is a deficient number, since it is larger than the sum of its proper divisors (36002961).

74243439 is a wasteful number, since it uses less digits than its factorization.

74243439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6411 (or 6405 counting only the distinct ones).

The product of its digits is 72576, while the sum is 36.

The square root of 74243439 is about 8616.4632535629. The cubic root of 74243439 is about 420.2935193144.

The spelling of 74243439 in words is "seventy-four million, two hundred forty-three thousand, four hundred thirty-nine".