728117322 has 8 divisors (see below), whose sum is σ = 1456234656. Its totient is φ = 242705772.

The previous prime is 728117321. The next prime is 728117333. The reversal of 728117322 is 223711827.

It is a sphenic number, since it is the product of 3 distinct primes.

728117322 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (728117321) 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 in 3 ways as a sum of consecutive naturals, for example, 60676438 + ... + 60676449.

It is an arithmetic number, because the mean of its divisors is an integer number (182029332).

Almost surely, 2^728117322 is an apocalyptic number.

728117322 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.

728117322 is a wasteful number, since it uses less digits than its factorization.

728117322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121352892.

The product of its digits is 9408, while the sum is 33.

The square root of 728117322 is about 26983.6491601859. The cubic root of 728117322 is about 899.6366113207.

The spelling of 728117322 in words is "seven hundred twenty-eight million, one hundred seventeen thousand, three hundred twenty-two".