71841812 has 48 divisors (see below), whose sum is σ = 153162240. Its totient is φ = 28799712.

The previous prime is 71841773. The next prime is 71841817. The reversal of 71841812 is 21814817.

It is a super-2 number, since 2×71841812² = 10322491902886688, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71841817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43343 + ... + 44969.

It is an arithmetic number, because the mean of its divisors is an integer number (3190880).

Almost surely, 2^71841812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71841812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76581120).

71841812 is an abundant number, since it is smaller than the sum of its proper divisors (81320428).

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

71841812 is a wasteful number, since it uses less digits than its factorization.

71841812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1738 counting only the distinct ones).

The product of its digits is 3584, while the sum is 32.

The square root of 71841812 is about 8475.9549314517. The cubic root of 71841812 is about 415.7118705636.

The spelling of 71841812 in words is "seventy-one million, eight hundred forty-one thousand, eight hundred twelve".