71564860 has 12 divisors (see below), whose sum is σ = 150286248. Its totient is φ = 28625936.

The previous prime is 71564851. The next prime is 71564861. The reversal of 71564860 is 6846517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71564861) 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, 1789102 + ... + 1789141.

It is an arithmetic number, because the mean of its divisors is an integer number (12523854).

Almost surely, 2^71564860 is an apocalyptic number.

It is an amenable number.

71564860 is an abundant number, since it is smaller than the sum of its proper divisors (78721388).

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

71564860 is a wasteful number, since it uses less digits than its factorization.

71564860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578252 (or 3578250 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 71564860 is about 8459.6016454677. The cubic root of 71564860 is about 415.1769893928.

The spelling of 71564860 in words is "seventy-one million, five hundred sixty-four thousand, eight hundred sixty".