728436433 has 2 divisors, whose sum is σ = 728436434. Its totient is φ = 728436432.

The previous prime is 728436391. The next prime is 728436461. The reversal of 728436433 is 334634827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621355329 + 107081104 = 24927^2 + 10348^2 .

It is an emirp because it is prime and its reverse (334634827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728436433 - 2²¹ = 726339281 is a prime.

It is equal to p_37647832 and since 728436433 and 37647832 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (728436493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364218216 + 364218217.

It is an arithmetic number, because the mean of its divisors is an integer number (364218217).

Almost surely, 2^728436433 is an apocalyptic number.

It is an amenable number.

728436433 is a deficient number, since it is larger than the sum of its proper divisors (1).

728436433 is an equidigital number, since it uses as much as digits as its factorization.

728436433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 40.

The square root of 728436433 is about 26989.5615562758. The cubic root of 728436433 is about 899.7680196347.

The spelling of 728436433 in words is "seven hundred twenty-eight million, four hundred thirty-six thousand, four hundred thirty-three".