74439 has 10 divisors (see below), whose sum is σ = 111320. Its totient is φ = 49572.

The previous prime is 74419. The next prime is 74441. The reversal of 74439 is 93447.

It is not a de Polignac number, because 74439 - 2⁷ = 74311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

74439 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74419) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 379 + ... + 540.

It is an arithmetic number, because the mean of its divisors is an integer number (11132).

2⁷⁴⁴³⁹ is an apocalyptic number.

74439 is a deficient number, since it is larger than the sum of its proper divisors (36881).

74439 is an equidigital number, since it uses as much as digits as its factorization.

74439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 922 counting only the distinct ones).

The product of its digits is 3024, while the sum is 27.

The square root of 74439 is about 272.8351150420. The cubic root of 74439 is about 42.0662220624.

The spelling of 74439 in words is "seventy-four thousand, four hundred thirty-nine".