726991746 has 64 divisors (see below), whose sum is σ = 1631629440. Its totient is φ = 214479360.

The previous prime is 726991739. The next prime is 726991753. The reversal of 726991746 is 647199627.

It is an interprime number because it is at equal distance from previous prime (726991739) and next prime (726991753).

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, 186756 + ... + 190608.

It is an arithmetic number, because the mean of its divisors is an integer number (25494210).

Almost surely, 2^726991746 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726991746, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815814720).

726991746 is an abundant number, since it is smaller than the sum of its proper divisors (904637694).

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

726991746 is a wasteful number, since it uses less digits than its factorization.

726991746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3971.

The product of its digits is 1143072, while the sum is 51.

The square root of 726991746 is about 26962.7844630335. The cubic root of 726991746 is about 899.1727979652.

The spelling of 726991746 in words is "seven hundred twenty-six million, nine hundred ninety-one thousand, seven hundred forty-six".