71816860 has 24 divisors (see below), whose sum is σ = 152374320. Its totient is φ = 28429824.

The previous prime is 71816839. The next prime is 71816861. The reversal of 71816860 is 6861817.

It is a super-2 number, since 2×71816860² = 10315322760519200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71816861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16570 + ... + 20449.

It is an arithmetic number, because the mean of its divisors is an integer number (6348930).

Almost surely, 2^71816860 is an apocalyptic number.

It is an amenable number.

71816860 is an abundant number, since it is smaller than the sum of its proper divisors (80557460).

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

71816860 is a wasteful number, since it uses less digits than its factorization.

71816860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37125 (or 37123 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 71816860 is about 8474.4828750786. The cubic root of 71816860 is about 415.6637368309.

It can be divided in two parts, 7181 and 6860, that added together give a palindrome (14041).

The spelling of 71816860 in words is "seventy-one million, eight hundred sixteen thousand, eight hundred sixty".