74442 has 16 divisors (see below), whose sum is σ = 156960. Its totient is φ = 23472.

The previous prime is 74441. The next prime is 74449. The reversal of 74442 is 24447.

It is a super-2 number, since 2×74442² = 11083222728, which contains 22 as substring.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213 + ... + 440.

It is an arithmetic number, because the mean of its divisors is an integer number (9810).

2⁷⁴⁴⁴² is an apocalyptic number.

74442 is an abundant number, since it is smaller than the sum of its proper divisors (82518).

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 (78480).

74442 is a wasteful number, since it uses less digits than its factorization.

74442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677.

The product of its digits is 896, while the sum is 21.

The square root of 74442 is about 272.8406128127. The cubic root of 74442 is about 42.0667871648.

Adding to 74442 its reverse (24447), we get a palindrome (98889).

The spelling of 74442 in words is "seventy-four thousand, four hundred forty-two", and thus it is an iban number.