729991052 has 12 divisors (see below), whose sum is σ = 1459982160. Its totient is φ = 312853296.

The previous prime is 729991051. The next prime is 729991061. The reversal of 729991052 is 250199927.

It is a happy number.

729991052 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 729990994 and 729991012.

It is not an unprimeable number, because it can be changed into a prime (729991051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13035527 + ... + 13035582.

It is an arithmetic number, because the mean of its divisors is an integer number (121665180).

Almost surely, 2^729991052 is an apocalyptic number.

It is an amenable number.

729991052 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

729991052 is a wasteful number, since it uses less digits than its factorization.

729991052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26071120 (or 26071118 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 44.

The square root of 729991052 is about 27018.3465815360. The cubic root of 729991052 is about 900.4076556534.

The spelling of 729991052 in words is "seven hundred twenty-nine million, nine hundred ninety-one thousand, fifty-two".