728647333 has 4 divisors (see below), whose sum is σ = 728752480. Its totient is φ = 728542188.

The previous prime is 728647279. The next prime is 728647351. The reversal of 728647333 is 333746827.

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 not a de Polignac number, because 728647333 - 2¹³ = 728639141 is a prime.

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 728647333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728647373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41385 + ... + 56302.

It is an arithmetic number, because the mean of its divisors is an integer number (182188120).

Almost surely, 2^728647333 is an apocalyptic number.

It is an amenable number.

728647333 is a deficient number, since it is larger than the sum of its proper divisors (105147).

728647333 is an equidigital number, since it uses as much as digits as its factorization.

728647333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105146.

The product of its digits is 508032, while the sum is 43.

The square root of 728647333 is about 26993.4683395817. The cubic root of 728647333 is about 899.8548461379.

The spelling of 728647333 in words is "seven hundred twenty-eight million, six hundred forty-seven thousand, three hundred thirty-three".