74440 has 16 divisors (see below), whose sum is σ = 167580. Its totient is φ = 29760.

The previous prime is 74419. The next prime is 74441. The reversal of 74440 is 4447.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60516 + 13924 = 246^2 + 118^2 .

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (74441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 891 + ... + 970.

2⁷⁴⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

74440 is an abundant number, since it is smaller than the sum of its proper divisors (93140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83790).

74440 is a wasteful number, since it uses less digits than its factorization.

74440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1872 (or 1868 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 74440 is about 272.8369476446. The cubic root of 74440 is about 42.0664104315.

Adding to 74440 its reverse (4447), we get a palindrome (78887).

It can be divided in two parts, 744 and 40, that added together give a square (784 = 28²).

The spelling of 74440 in words is "seventy-four thousand, four hundred forty", and thus it is an iban number.