28120659 has 12 divisors (see below), whose sum is σ = 43615944. Its totient is φ = 16068864.

The previous prime is 28120643. The next prime is 28120661. The reversal of 28120659 is 95602182.

It is not a de Polignac number, because 28120659 - 2⁴ = 28120643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28120619) 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 in 11 ways as a sum of consecutive naturals, for example, 95502 + ... + 95795.

It is an arithmetic number, because the mean of its divisors is an integer number (3634662).

Almost surely, 2^28120659 is an apocalyptic number.

28120659 is a deficient number, since it is larger than the sum of its proper divisors (15495285).

28120659 is a wasteful number, since it uses less digits than its factorization.

28120659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191314 (or 191307 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 28120659 is about 5302.8915697004. The cubic root of 28120659 is about 304.0944528469.

The spelling of 28120659 in words is "twenty-eight million, one hundred twenty thousand, six hundred fifty-nine".