726559540 has 24 divisors (see below), whose sum is σ = 1743743232. Its totient is φ = 249106080.

The previous prime is 726559529. The next prime is 726559541. The reversal of 726559540 is 45955627.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726559541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2594716 + ... + 2594995.

It is an arithmetic number, because the mean of its divisors is an integer number (72655968).

Almost surely, 2^726559540 is an apocalyptic number.

726559540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

726559540 is an abundant number, since it is smaller than the sum of its proper divisors (1017183692).

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

726559540 is a wasteful number, since it uses less digits than its factorization.

726559540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5189727 (or 5189725 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 43.

The square root of 726559540 is about 26954.7684093186. The cubic root of 726559540 is about 898.9945726870.

The spelling of 726559540 in words is "seven hundred twenty-six million, five hundred fifty-nine thousand, five hundred forty".