72543648 has 24 divisors (see below), whose sum is σ = 190427328. Its totient is φ = 24181184.

The previous prime is 72543619. The next prime is 72543661. The reversal of 72543648 is 84634527.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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, 377736 + ... + 377927.

It is an arithmetic number, because the mean of its divisors is an integer number (7934472).

Almost surely, 2^72543648 is an apocalyptic number.

It is an amenable number.

72543648 is an abundant number, since it is smaller than the sum of its proper divisors (117883680).

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

72543648 is a wasteful number, since it uses less digits than its factorization.

72543648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755676 (or 755668 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 72543648 is about 8517.2558961205. The cubic root of 72543648 is about 417.0612082286.

The spelling of 72543648 in words is "seventy-two million, five hundred forty-three thousand, six hundred forty-eight".