71347728 has 20 divisors (see below), whose sum is σ = 184315088. Its totient is φ = 23782560.

The previous prime is 71347693. The next prime is 71347733. The reversal of 71347728 is 82774317.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 743158 + ... + 743253.

Almost surely, 2^71347728 is an apocalyptic number.

It is an amenable number.

71347728 is an abundant number, since it is smaller than the sum of its proper divisors (112967360).

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

71347728 is a wasteful number, since it uses less digits than its factorization.

71347728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486422 (or 1486416 counting only the distinct ones).

The product of its digits is 65856, while the sum is 39.

The square root of 71347728 is about 8446.7584314931. The cubic root of 71347728 is about 414.7566735390.

The spelling of 71347728 in words is "seventy-one million, three hundred forty-seven thousand, seven hundred twenty-eight".