728223933 has 16 divisors (see below), whose sum is σ = 982335296. Its totient is φ = 479831040.

The previous prime is 728223931. The next prime is 728224027. The reversal of 728223933 is 339322827.

It is not a de Polignac number, because 728223933 - 2¹ = 728223931 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 728223891 and 728223900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728223931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86898 + ... + 94908.

It is an arithmetic number, because the mean of its divisors is an integer number (61395956).

Almost surely, 2^728223933 is an apocalyptic number.

It is an amenable number.

728223933 is a deficient number, since it is larger than the sum of its proper divisors (254111363).

728223933 is a wasteful number, since it uses less digits than its factorization.

728223933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8364.

The product of its digits is 108864, while the sum is 39.

The square root of 728223933 is about 26985.6245619774. The cubic root of 728223933 is about 899.6805174675.

The spelling of 728223933 in words is "seven hundred twenty-eight million, two hundred twenty-three thousand, nine hundred thirty-three".