726442172 has 12 divisors (see below), whose sum is σ = 1300838616. Its totient is φ = 354774000.

The previous prime is 726442169. The next prime is 726442177. The reversal of 726442172 is 271244627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726442177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2111579 + ... + 2111922.

It is an arithmetic number, because the mean of its divisors is an integer number (108403218).

Almost surely, 2^726442172 is an apocalyptic number.

It is an amenable number.

726442172 is a deficient number, since it is larger than the sum of its proper divisors (574396444).

726442172 is a wasteful number, since it uses less digits than its factorization.

726442172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4223548 (or 4223546 counting only the distinct ones).

The product of its digits is 37632, while the sum is 35.

The square root of 726442172 is about 26952.5911926850. The cubic root of 726442172 is about 898.9461623956.

Adding to 726442172 its reverse (271244627), we get a palindrome (997686799).

The spelling of 726442172 in words is "seven hundred twenty-six million, four hundred forty-two thousand, one hundred seventy-two".