71644672 has 40 divisors (see below), whose sum is σ = 156175272. Its totient is φ = 32563200.

The previous prime is 71644669. The next prime is 71644679. The reversal of 71644672 is 27644617.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71644679) 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, 729 + ... + 11992.

Almost surely, 2^71644672 is an apocalyptic number.

It is an amenable number.

71644672 is an abundant number, since it is smaller than the sum of its proper divisors (84530600).

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

71644672 is a wasteful number, since it uses less digits than its factorization.

71644672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12750 (or 12734 counting only the distinct ones).

The product of its digits is 56448, while the sum is 37.

The square root of 71644672 is about 8464.3175743825. The cubic root of 71644672 is about 415.3312727253.

The spelling of 71644672 in words is "seventy-one million, six hundred forty-four thousand, six hundred seventy-two".