728290322 has 4 divisors (see below), whose sum is σ = 1092435486. Its totient is φ = 364145160.

The previous prime is 728290309. The next prime is 728290327. The reversal of 728290322 is 223092827.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 391604521 + 336685801 = 19789^2 + 18349^2 .

It is not an unprimeable number, because it can be changed into a prime (728290327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 182072579 + ... + 182072582.

Almost surely, 2^728290322 is an apocalyptic number.

728290322 is a deficient number, since it is larger than the sum of its proper divisors (364145164).

728290322 is a wasteful number, since it uses less digits than its factorization.

728290322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364145163.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 728290322 is about 26986.8546147935. The cubic root of 728290322 is about 899.7078566198.

The spelling of 728290322 in words is "seven hundred twenty-eight million, two hundred ninety thousand, three hundred twenty-two".