72209718 has 80 divisors (see below), whose sum is σ = 190026144. Its totient is φ = 20062080.

The previous prime is 72209701. The next prime is 72209723. The reversal of 72209718 is 81790227.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 41098 + ... + 42818.

Almost surely, 2^72209718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72209718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95013072).

72209718 is an abundant number, since it is smaller than the sum of its proper divisors (117816426).

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

72209718 is a wasteful number, since it uses less digits than its factorization.

72209718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1770 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 72209718 is about 8497.6301402214. The cubic root of 72209718 is about 416.4202906838.

It can be divided in two parts, 72209 and 718, that added together give a palindrome (72927).

The spelling of 72209718 in words is "seventy-two million, two hundred nine thousand, seven hundred eighteen".