728042233 has 2 divisors, whose sum is σ = 728042234. Its totient is φ = 728042232.

The previous prime is 728042191. The next prime is 728042243. The reversal of 728042233 is 332240827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 619611664 + 108430569 = 24892^2 + 10413^2 .

It is a cyclic number.

It is not a de Polignac number, because 728042233 - 2¹⁷ = 727911161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 728042195 and 728042204.

It is not a weakly prime, because it can be changed into another prime (728042243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364021116 + 364021117.

It is an arithmetic number, because the mean of its divisors is an integer number (364021117).

Almost surely, 2^728042233 is an apocalyptic number.

It is an amenable number.

728042233 is a deficient number, since it is larger than the sum of its proper divisors (1).

728042233 is an equidigital number, since it uses as much as digits as its factorization.

728042233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 728042233 is about 26982.2577446736. The cubic root of 728042233 is about 899.6056844661.

The spelling of 728042233 in words is "seven hundred twenty-eight million, forty-two thousand, two hundred thirty-three".