728362133 has 4 divisors (see below), whose sum is σ = 729401868. Its totient is φ = 727322400.

The previous prime is 728362123. The next prime is 728362147. The reversal of 728362133 is 331263827.

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

It can be written as a sum of positive squares in 2 ways, for example, as 563445169 + 164916964 = 23737^2 + 12842^2 .

It is a cyclic number.

It is not a de Polignac number, because 728362133 - 2⁶ = 728362069 is a prime.

It is a super-2 number, since 2×728362133² = 1061022793576619378, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 728362093 and 728362102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728362123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518816 + ... + 520217.

It is an arithmetic number, because the mean of its divisors is an integer number (182350467).

Almost surely, 2^728362133 is an apocalyptic number.

It is an amenable number.

728362133 is a deficient number, since it is larger than the sum of its proper divisors (1039735).

728362133 is a wasteful number, since it uses less digits than its factorization.

728362133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039734.

The product of its digits is 36288, while the sum is 35.

The square root of 728362133 is about 26988.1850630975. The cubic root of 728362133 is about 899.7374266944.

The spelling of 728362133 in words is "seven hundred twenty-eight million, three hundred sixty-two thousand, one hundred thirty-three".