726733730 has 8 divisors (see below), whose sum is σ = 1308120732. Its totient is φ = 290693488.

The previous prime is 726733727. The next prime is 726733747. The reversal of 726733730 is 37337627.

It can be written as a sum of positive squares in 2 ways, for example, as 614097961 + 112635769 = 24781^2 + 10613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

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, 36336677 + ... + 36336696.

Almost surely, 2^726733730 is an apocalyptic number.

726733730 is a deficient number, since it is larger than the sum of its proper divisors (581387002).

726733730 is a wasteful number, since it uses less digits than its factorization.

726733730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72673380.

The product of its (nonzero) digits is 111132, while the sum is 38.

The square root of 726733730 is about 26957.9993693894. Note that the first 3 decimals coincide. The cubic root of 726733730 is about 899.0664105031.

The spelling of 726733730 in words is "seven hundred twenty-six million, seven hundred thirty-three thousand, seven hundred thirty".