71972544 has 56 divisors (see below), whose sum is σ = 217635328. Its totient is φ = 20563200.

The previous prime is 71972533. The next prime is 71972561. The reversal of 71972544 is 44527917.

It is a tau number, because it is divible by the number of its divisors (56).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25432 + ... + 28119.

Almost surely, 2^71972544 is an apocalyptic number.

It is an amenable number.

71972544 is an abundant number, since it is smaller than the sum of its proper divisors (145662784).

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

71972544 is a wasteful number, since it uses less digits than its factorization.

71972544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53573 (or 53563 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 71972544 is about 8483.6633596578. The cubic root of 71972544 is about 415.9638775341.

The spelling of 71972544 in words is "seventy-one million, nine hundred seventy-two thousand, five hundred forty-four".