71320860 has 144 divisors (see below), whose sum is σ = 241244640. Its totient is φ = 16934400.

The previous prime is 71320859. The next prime is 71320871. The reversal of 71320860 is 6802317.

It is a super-2 number, since 2×71320860² = 10173330142279200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67335 + ... + 68385.

It is an arithmetic number, because the mean of its divisors is an integer number (1675310).

Almost surely, 2^71320860 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 71320860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120622320).

71320860 is an abundant number, since it is smaller than the sum of its proper divisors (169923780).

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

71320860 is a wasteful number, since it uses less digits than its factorization.

71320860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 71320860 is about 8445.1678491312. The cubic root of 71320860 is about 414.7046042265.

The spelling of 71320860 in words is "seventy-one million, three hundred twenty thousand, eight hundred sixty".