72111344 has 40 divisors (see below), whose sum is σ = 143858352. Its totient is φ = 34997760.

The previous prime is 72111343. The next prime is 72111379. The reversal of 72111344 is 44311127.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72111341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193142 + ... + 193514.

Almost surely, 2^72111344 is an apocalyptic number.

It is an amenable number.

72111344 is a deficient number, since it is larger than the sum of its proper divisors (71747008).

72111344 is a wasteful number, since it uses less digits than its factorization.

72111344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705 (or 699 counting only the distinct ones).

The product of its digits is 672, while the sum is 23.

The square root of 72111344 is about 8491.8398477597. The cubic root of 72111344 is about 416.2311030989.

The spelling of 72111344 in words is "seventy-two million, one hundred eleven thousand, three hundred forty-four".