728449633 has 2 divisors, whose sum is σ = 728449634. Its totient is φ = 728449632.

The previous prime is 728449621. The next prime is 728449639. The reversal of 728449633 is 336944827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 705858624 + 22591009 = 26568^2 + 4753^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-728449633 is a prime.

It is not a weakly prime, because it can be changed into another prime (728449639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364224816 + 364224817.

It is an arithmetic number, because the mean of its divisors is an integer number (364224817).

Almost surely, 2^728449633 is an apocalyptic number.

It is an amenable number.

728449633 is a deficient number, since it is larger than the sum of its proper divisors (1).

728449633 is an equidigital number, since it uses as much as digits as its factorization.

728449633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 46.

The square root of 728449633 is about 26989.8060941534. The cubic root of 728449633 is about 899.7734545020.

The spelling of 728449633 in words is "seven hundred twenty-eight million, four hundred forty-nine thousand, six hundred thirty-three".