726643736 has 48 divisors (see below), whose sum is σ = 1706826240. Its totient is φ = 287461440.

The previous prime is 726643711. The next prime is 726643739. The reversal of 726643736 is 637346627.

726643736 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×726643736² = 1056022238136075392, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726643739) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66200 + ... + 76391.

It is an arithmetic number, because the mean of its divisors is an integer number (35558880).

Almost surely, 2^726643736 is an apocalyptic number.

It is an amenable number.

726643736 is an abundant number, since it is smaller than the sum of its proper divisors (980182504).

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

726643736 is a wasteful number, since it uses less digits than its factorization.

726643736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142624 (or 142613 counting only the distinct ones).

The product of its digits is 762048, while the sum is 44.

The square root of 726643736 is about 26956.3301656587. The cubic root of 726643736 is about 899.0292974499.

The spelling of 726643736 in words is "seven hundred twenty-six million, six hundred forty-three thousand, seven hundred thirty-six".