726522240 has 256 divisors, whose sum is σ = 2418232320. Its totient is φ = 185401344.

The previous prime is 726522233. The next prime is 726522253. The reversal of 726522240 is 42225627.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 726522198 and 726522207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7489872 + ... + 7489968.

It is an arithmetic number, because the mean of its divisors is an integer number (9446220).

Almost surely, 2^726522240 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 726522240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209116160).

726522240 is an abundant number, since it is smaller than the sum of its proper divisors (1691710080).

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

726522240 is a wasteful number, since it uses less digits than its factorization.

726522240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 726522240 is about 26954.0765005963. The cubic root of 726522240 is about 898.9791882761.

Adding to 726522240 its reverse (42225627), we get a palindrome (768747867).

The spelling of 726522240 in words is "seven hundred twenty-six million, five hundred twenty-two thousand, two hundred forty".