28061659 has 2 divisors, whose sum is σ = 28061660. Its totient is φ = 28061658.

The previous prime is 28061623. The next prime is 28061681. The reversal of 28061659 is 95616082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28061659 - 2¹⁷ = 27930587 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28061359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14030829 + 14030830.

It is an arithmetic number, because the mean of its divisors is an integer number (14030830).

Almost surely, 2^28061659 is an apocalyptic number.

28061659 is a deficient number, since it is larger than the sum of its proper divisors (1).

28061659 is an equidigital number, since it uses as much as digits as its factorization.

28061659 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 28061659 is about 5297.3256460218. The cubic root of 28061659 is about 303.8816302490.

It can be divided in two parts, 2806 and 1659, that added together give a triangular number (4465 = T₉₄).

The spelling of 28061659 in words is "twenty-eight million, sixty-one thousand, six hundred fifty-nine".