726733818 has 12 divisors (see below), whose sum is σ = 1574589978. Its totient is φ = 242244600.

The previous prime is 726733817. The next prime is 726733873. The reversal of 726733818 is 818337627.

726733818 is a `hidden beast` number, since 7 + 267 + 3 + 381 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 724309569 + 2424249 = 26913^2 + 1557^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (726733811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20187033 + ... + 20187068.

Almost surely, 2^726733818 is an apocalyptic number.

726733818 is an abundant number, since it is smaller than the sum of its proper divisors (847856160).

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

726733818 is a wasteful number, since it uses less digits than its factorization.

726733818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40374109 (or 40374106 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 726733818 is about 26958.0010015580. The cubic root of 726733818 is about 899.0664467923.

The spelling of 726733818 in words is "seven hundred twenty-six million, seven hundred thirty-three thousand, eight hundred eighteen".