28646787 has 16 divisors (see below), whose sum is σ = 41232128. Its totient is φ = 17586720.

The previous prime is 28646777. The next prime is 28646831. The reversal of 28646787 is 78764682.

It is not a de Polignac number, because 28646787 - 2⁴ = 28646771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28646747) 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 15 ways as a sum of consecutive naturals, for example, 26418 + ... + 27480.

It is an arithmetic number, because the mean of its divisors is an integer number (2577008).

Almost surely, 2^28646787 is an apocalyptic number.

28646787 is a deficient number, since it is larger than the sum of its proper divisors (12585341).

28646787 is a wasteful number, since it uses less digits than its factorization.

28646787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770.

The product of its digits is 903168, while the sum is 48.

The square root of 28646787 is about 5352.2693317882. The cubic root of 28646787 is about 305.9792480267.

The spelling of 28646787 in words is "twenty-eight million, six hundred forty-six thousand, seven hundred eighty-seven".