71840316 has 36 divisors (see below), whose sum is σ = 175247912. Its totient is φ = 22903584.

The previous prime is 71840303. The next prime is 71840333. The reversal of 71840316 is 61304817.

It is a happy number.

It is a super-2 number, since 2×71840316² = 10322062005959712, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 690 + ... + 12006.

Almost surely, 2^71840316 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 71840316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87623956).

71840316 is an abundant number, since it is smaller than the sum of its proper divisors (103407596).

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

71840316 is a wasteful number, since it uses less digits than its factorization.

71840316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11370 (or 11345 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 71840316 is about 8475.8666813489. The cubic root of 71840316 is about 415.7089850142.

The spelling of 71840316 in words is "seventy-one million, eight hundred forty thousand, three hundred sixteen".