729638180 has 24 divisors (see below), whose sum is σ = 1532773368. Its totient is φ = 291753728.

The previous prime is 729638179. The next prime is 729638201. The reversal of 729638180 is 81836927.

It can be written as a sum of positive squares in 4 ways, for example, as 274498624 + 455139556 = 16568^2 + 21334^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83792 + ... + 92088.

It is an arithmetic number, because the mean of its divisors is an integer number (63865557).

Almost surely, 2^729638180 is an apocalyptic number.

It is an amenable number.

729638180 is an abundant number, since it is smaller than the sum of its proper divisors (803135188).

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

729638180 is a wasteful number, since it uses less digits than its factorization.

729638180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12703 (or 12701 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 729638180 is about 27011.8155628236. The cubic root of 729638180 is about 900.2625489159.

The spelling of 729638180 in words is "seven hundred twenty-nine million, six hundred thirty-eight thousand, one hundred eighty".