72443888 has 20 divisors (see below), whose sum is σ = 153120408. Its totient is φ = 32928960.

The previous prime is 72443887. The next prime is 72443893. The reversal of 72443888 is 88834427.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72443887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205631 + ... + 205982.

Almost surely, 2^72443888 is an apocalyptic number.

It is an amenable number.

72443888 is an abundant number, since it is smaller than the sum of its proper divisors (80676520).

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

72443888 is a wasteful number, since it uses less digits than its factorization.

72443888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411632 (or 411626 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 72443888 is about 8511.3975350703. The cubic root of 72443888 is about 416.8699435501.

The spelling of 72443888 in words is "seventy-two million, four hundred forty-three thousand, eight hundred eighty-eight".