28646959 has 4 divisors (see below), whose sum is σ = 31251240. Its totient is φ = 26042680.

The previous prime is 28646957. The next prime is 28646971. The reversal of 28646959 is 95964682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28646959 - 2¹ = 28646957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28646951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1302124 + ... + 1302145.

It is an arithmetic number, because the mean of its divisors is an integer number (7812810).

Almost surely, 2^28646959 is an apocalyptic number.

28646959 is a deficient number, since it is larger than the sum of its proper divisors (2604281).

28646959 is a wasteful number, since it uses less digits than its factorization.

28646959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2604280.

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

The square root of 28646959 is about 5352.2853997148. The cubic root of 28646959 is about 305.9798604086.

The spelling of 28646959 in words is "twenty-eight million, six hundred forty-six thousand, nine hundred fifty-nine".