728041817 has 2 divisors, whose sum is σ = 728041818. Its totient is φ = 728041816.

The previous prime is 728041799. The next prime is 728041823. The reversal of 728041817 is 718140827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 709902736 + 18139081 = 26644^2 + 4259^2 .

It is a cyclic number.

It is not a de Polignac number, because 728041817 - 2¹⁶ = 727976281 is a prime.

It is a super-2 number, since 2×728041817² = 1060089774601322978, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728041117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364020908 + 364020909.

It is an arithmetic number, because the mean of its divisors is an integer number (364020909).

Almost surely, 2^728041817 is an apocalyptic number.

It is an amenable number.

728041817 is a deficient number, since it is larger than the sum of its proper divisors (1).

728041817 is an equidigital number, since it uses as much as digits as its factorization.

728041817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 38.

The square root of 728041817 is about 26982.2500359032. The cubic root of 728041817 is about 899.6055131225.

The spelling of 728041817 in words is "seven hundred twenty-eight million, forty-one thousand, eight hundred seventeen".