71047272 has 16 divisors (see below), whose sum is σ = 177618240. Its totient is φ = 23682416.

The previous prime is 71047271. The next prime is 71047279. The reversal of 71047272 is 27274017.

71047272 is a modest number, since divided by 7272 gives 7104 as remainder.

It is not an unprimeable number, because it can be changed into a prime (71047271) 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, 1480128 + ... + 1480175.

It is an arithmetic number, because the mean of its divisors is an integer number (11101140).

Almost surely, 2^71047272 is an apocalyptic number.

It is an amenable number.

71047272 is an abundant number, since it is smaller than the sum of its proper divisors (106570968).

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

71047272 is a wasteful number, since it uses less digits than its factorization.

71047272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2960312 (or 2960308 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 71047272 is about 8428.9543835520. The cubic root of 71047272 is about 414.1736534917.

The spelling of 71047272 in words is "seventy-one million, forty-seven thousand, two hundred seventy-two".