5728661 has 2 divisors, whose sum is σ = 5728662. Its totient is φ = 5728660.

The previous prime is 5728651. The next prime is 5728691. The reversal of 5728661 is 1668275.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4884100 + 844561 = 2210^2 + 919^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5728661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5728621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2864330 + 2864331.

It is an arithmetic number, because the mean of its divisors is an integer number (2864331).

Almost surely, 2^5728661 is an apocalyptic number.

It is an amenable number.

5728661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5728661 is an equidigital number, since it uses as much as digits as its factorization.

5728661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 5728661 is about 2393.4621367383. The cubic root of 5728661 is about 178.9304995314.

The spelling of 5728661 in words is "five million, seven hundred twenty-eight thousand, six hundred sixty-one".