72212544 has 84 divisors (see below), whose sum is σ = 208184496. Its totient is φ = 23931648.

The previous prime is 72212509. The next prime is 72212551. The reversal of 72212544 is 44521227.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 162787 + ... + 163229.

Almost surely, 2^72212544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72212544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104092248).

72212544 is an abundant number, since it is smaller than the sum of its proper divisors (135971952).

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

72212544 is a wasteful number, since it uses less digits than its factorization.

72212544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 731 counting only the distinct ones).

The product of its digits is 4480, while the sum is 27.

The square root of 72212544 is about 8497.7964202492. The cubic root of 72212544 is about 416.4257229553.

The spelling of 72212544 in words is "seventy-two million, two hundred twelve thousand, five hundred forty-four".