729128470 has 32 divisors (see below), whose sum is σ = 1588154688. Its totient is φ = 235281408.

The previous prime is 729128459. The next prime is 729128471. The reversal of 729128470 is 74821927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (729128471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 305167 + ... + 307546.

It is an arithmetic number, because the mean of its divisors is an integer number (49629834).

Almost surely, 2^729128470 is an apocalyptic number.

729128470 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

729128470 is an abundant number, since it is smaller than the sum of its proper divisors (859026218).

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

729128470 is a wasteful number, since it uses less digits than its factorization.

729128470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612744.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 729128470 is about 27002.3789692686. The cubic root of 729128470 is about 900.0528652074.

The spelling of 729128470 in words is "seven hundred twenty-nine million, one hundred twenty-eight thousand, four hundred seventy".