728722222873 has 8 divisors (see below), whose sum is σ = 746757891936. Its totient is φ = 710699028000.

The previous prime is 728722222847. The next prime is 728722222883. The reversal of 728722222873 is 378222227827.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728722222873 is a prime.

It is a super-3 number, since 3×728722222873³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 728722222873.

It is not an unprimeable number, because it can be changed into a prime (728722222883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3000211 + ... + 3233992.

It is an arithmetic number, because the mean of its divisors is an integer number (93344736492).

Almost surely, 2^728722222873 is an apocalyptic number.

It is an amenable number.

728722222873 is a deficient number, since it is larger than the sum of its proper divisors (18035669063).

728722222873 is a wasteful number, since it uses less digits than its factorization.

728722222873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6237095.

The product of its digits is 4214784, while the sum is 52.

The spelling of 728722222873 in words is "seven hundred twenty-eight billion, seven hundred twenty-two million, two hundred twenty-two thousand, eight hundred seventy-three".