729206520 has 64 divisors (see below), whose sum is σ = 2500139520. Its totient is φ = 166675584.

The previous prime is 729206519. The next prime is 729206549. The reversal of 729206520 is 25602927.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 433212 + ... + 434891.

It is an arithmetic number, because the mean of its divisors is an integer number (39064680).

Almost surely, 2^729206520 is an apocalyptic number.

729206520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

729206520 is an abundant number, since it is smaller than the sum of its proper divisors (1770933000).

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

729206520 is a wasteful number, since it uses less digits than its factorization.

729206520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868124 (or 868120 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 729206520 is about 27003.8241736240. The cubic root of 729206520 is about 900.0849796301.

The spelling of 729206520 in words is "seven hundred twenty-nine million, two hundred six thousand, five hundred twenty".