729159990 has 128 divisors (see below), whose sum is σ = 1994194944. Its totient is φ = 169344000.

The previous prime is 729159947. The next prime is 729159997. The reversal of 729159990 is 99951927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729159997) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 494955 + ... + 496425.

It is an arithmetic number, because the mean of its divisors is an integer number (15579648).

Almost surely, 2^729159990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729159990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997097472).

729159990 is an abundant number, since it is smaller than the sum of its proper divisors (1265034954).

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

729159990 is a wasteful number, since it uses less digits than its factorization.

729159990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566.

The product of its (nonzero) digits is 459270, while the sum is 51.

The square root of 729159990 is about 27002.9626152391. The cubic root of 729159990 is about 900.0658346903.

The spelling of 729159990 in words is "seven hundred twenty-nine million, one hundred fifty-nine thousand, nine hundred ninety".