728290229 has 4 divisors (see below), whose sum is σ = 731498784. Its totient is φ = 725081676.

The previous prime is 728290153. The next prime is 728290231. The reversal of 728290229 is 922092827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728290229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728290249) 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 3 ways as a sum of consecutive naturals, for example, 1603937 + ... + 1604390.

It is an arithmetic number, because the mean of its divisors is an integer number (182874696).

Almost surely, 2^728290229 is an apocalyptic number.

It is an amenable number.

728290229 is a deficient number, since it is larger than the sum of its proper divisors (3208555).

728290229 is a wasteful number, since it uses less digits than its factorization.

728290229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3208554.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 728290229 is about 26986.8528917323. The cubic root of 728290229 is about 899.7078183233.

The spelling of 728290229 in words is "seven hundred twenty-eight million, two hundred ninety thousand, two hundred twenty-nine".