729722280 has 256 divisors, whose sum is σ = 2675566080. Its totient is φ = 155418624.

The previous prime is 729722267. The next prime is 729722333. The reversal of 729722280 is 82227927.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1956174 + ... + 1956546.

It is an arithmetic number, because the mean of its divisors is an integer number (10451430).

Almost surely, 2^729722280 is an apocalyptic number.

729722280 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 729722280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337783040).

729722280 is an abundant number, since it is smaller than the sum of its proper divisors (1945843800).

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

729722280 is a wasteful number, since it uses less digits than its factorization.

729722280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 729722280 is about 27013.3722441312. The cubic root of 729722280 is about 900.2971364570.

The spelling of 729722280 in words is "seven hundred twenty-nine million, seven hundred twenty-two thousand, two hundred eighty".