28860939 has 12 divisors (see below), whose sum is σ = 41735616. Its totient is φ = 19218672.

The previous prime is 28860919. The next prime is 28860941. The reversal of 28860939 is 93906882.

28860939 is a `hidden beast` number, since 2 + 8 + 8 + 609 + 39 = 666.

It is not a de Polignac number, because 28860939 - 2⁸ = 28860683 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28860894 and 28860903.

It is not an unprimeable number, because it can be changed into a prime (28860919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11974 + ... + 14180.

It is an arithmetic number, because the mean of its divisors is an integer number (3477968).

Almost surely, 2^28860939 is an apocalyptic number.

28860939 is a deficient number, since it is larger than the sum of its proper divisors (12874677).

28860939 is a wasteful number, since it uses less digits than its factorization.

28860939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666 (or 3663 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 28860939 is about 5372.2378018848. The cubic root of 28860939 is about 306.7398157000.

The spelling of 28860939 in words is "twenty-eight million, eight hundred sixty thousand, nine hundred thirty-nine".