726804180 has 72 divisors (see below), whose sum is σ = 2220806952. Its totient is φ = 192393216.

The previous prime is 726804161. The next prime is 726804217. The reversal of 726804180 is 81408627.

It can be written as a sum of positive squares in 4 ways, for example, as 36796356 + 690007824 = 6066^2 + 26268^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9924 + ... + 39396.

It is an arithmetic number, because the mean of its divisors is an integer number (30844541).

Almost surely, 2^726804180 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 726804180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1110403476).

726804180 is an abundant number, since it is smaller than the sum of its proper divisors (1494002772).

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

726804180 is a wasteful number, since it uses less digits than its factorization.

726804180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29625 (or 29620 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 726804180 is about 26959.3059999697. The cubic root of 726804180 is about 899.0954615752.

The spelling of 726804180 in words is "seven hundred twenty-six million, eight hundred four thousand, one hundred eighty".