726491240 has 16 divisors (see below), whose sum is σ = 1634605380. Its totient is φ = 290596480.

The previous prime is 726491237. The next prime is 726491287. The reversal of 726491240 is 42194627.

It can be written as a sum of positive squares in 2 ways, for example, as 725655844 + 835396 = 26938^2 + 914^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 726491240.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9081101 + ... + 9081180.

Almost surely, 2^726491240 is an apocalyptic number.

It is an amenable number.

726491240 is an abundant number, since it is smaller than the sum of its proper divisors (908114140).

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

726491240 is a wasteful number, since it uses less digits than its factorization.

726491240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18162292 (or 18162288 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 726491240 is about 26953.5014422987. The cubic root of 726491240 is about 898.9664019040.

The spelling of 726491240 in words is "seven hundred twenty-six million, four hundred ninety-one thousand, two hundred forty".