71324442 has 64 divisors (see below), whose sum is σ = 190694400. Its totient is φ = 19303920.

The previous prime is 71324437. The next prime is 71324471. The reversal of 71324442 is 24442317.

It is a super-2 number, since 2×71324442² = 10174352053222728, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2217 + ... + 12147.

It is an arithmetic number, because the mean of its divisors is an integer number (2979600).

Almost surely, 2^71324442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71324442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95347200).

71324442 is an abundant number, since it is smaller than the sum of its proper divisors (119369958).

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

71324442 is a wasteful number, since it uses less digits than its factorization.

71324442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9968 (or 9962 counting only the distinct ones).

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

The square root of 71324442 is about 8445.3799204062. The cubic root of 71324442 is about 414.7115467817.

Adding to 71324442 its reverse (24442317), we get a palindrome (95766759).

The spelling of 71324442 in words is "seventy-one million, three hundred twenty-four thousand, four hundred forty-two".