28648863 has 8 divisors (see below), whose sum is σ = 42442800. Its totient is φ = 19099224.

The previous prime is 28648843. The next prime is 28648871. The reversal of 28648863 is 36884682.

It is a happy number.

It is not a de Polignac number, because 28648863 - 2⁵ = 28648831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530508 + ... + 530561.

It is an arithmetic number, because the mean of its divisors is an integer number (5305350).

Almost surely, 2^28648863 is an apocalyptic number.

28648863 is a deficient number, since it is larger than the sum of its proper divisors (13793937).

28648863 is a wasteful number, since it uses less digits than its factorization.

28648863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061078 (or 1061072 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 28648863 is about 5352.4632647035. The cubic root of 28648863 is about 305.9866391706.

The spelling of 28648863 in words is "twenty-eight million, six hundred forty-eight thousand, eight hundred sixty-three".