74312442 has 36 divisors (see below), whose sum is σ = 166787790. Its totient is φ = 23911776.

The previous prime is 74312431. The next prime is 74312443. The reversal of 74312442 is 24421347.

It can be written as a sum of positive squares in 3 ways, for example, as 74287161 + 25281 = 8619^2 + 159^2 .

It is not an unprimeable number, because it can be changed into a prime (74312443) 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 17 ways as a sum of consecutive naturals, for example, 12684 + ... + 17592.

Almost surely, 2^74312442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74312442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83393895).

74312442 is an abundant number, since it is smaller than the sum of its proper divisors (92475348).

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

74312442 is a wasteful number, since it uses less digits than its factorization.

74312442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4975 (or 4943 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 74312442 is about 8620.4664606969. The cubic root of 74312442 is about 420.4236880940.

Adding to 74312442 its reverse (24421347), we get a palindrome (98733789).

The spelling of 74312442 in words is "seventy-four million, three hundred twelve thousand, four hundred forty-two".