71881280 has 28 divisors (see below), whose sum is σ = 171168060. Its totient is φ = 28752384.

The previous prime is 71881267. The next prime is 71881289. The reversal of 71881280 is 8218817.

It can be written as a sum of positive squares in 2 ways, for example, as 53699584 + 18181696 = 7328^2 + 4264^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 71881280.

It is not an unprimeable number, because it can be changed into a prime (71881289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111995 + ... + 112634.

It is an arithmetic number, because the mean of its divisors is an integer number (6113145).

Almost surely, 2^71881280 is an apocalyptic number.

It is an amenable number.

71881280 is an abundant number, since it is smaller than the sum of its proper divisors (99286780).

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

71881280 is a wasteful number, since it uses less digits than its factorization.

71881280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224646 (or 224636 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 71881280 is about 8478.2828450105. The cubic root of 71881280 is about 415.7879836792.

The spelling of 71881280 in words is "seventy-one million, eight hundred eighty-one thousand, two hundred eighty".