28649659 has 2 divisors, whose sum is σ = 28649660. Its totient is φ = 28649658.

The previous prime is 28649639. The next prime is 28649689. The reversal of 28649659 is 95694682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28649659 - 2⁷ = 28649531 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28649639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14324829 + 14324830.

It is an arithmetic number, because the mean of its divisors is an integer number (14324830).

Almost surely, 2^28649659 is an apocalyptic number.

28649659 is a deficient number, since it is larger than the sum of its proper divisors (1).

28649659 is an equidigital number, since it uses as much as digits as its factorization.

28649659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 933120, while the sum is 49.

The square root of 28649659 is about 5352.5376224740. The cubic root of 28649659 is about 305.9894730598.

The spelling of 28649659 in words is "twenty-eight million, six hundred forty-nine thousand, six hundred fifty-nine".