28689678 has 24 divisors (see below), whose sum is σ = 62312328. Its totient is φ = 9539952.

The previous prime is 28689667. The next prime is 28689679. The reversal of 28689678 is 87698682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28689679) 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, 6700 + ... + 10112.

It is an arithmetic number, because the mean of its divisors is an integer number (2596347).

Almost surely, 2^28689678 is an apocalyptic number.

28689678 is an abundant number, since it is smaller than the sum of its proper divisors (33622650).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28689678 is a wasteful number, since it uses less digits than its factorization.

28689678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888 (or 3885 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 28689678 is about 5356.2746382164. The cubic root of 28689678 is about 306.1318795892.

The spelling of 28689678 in words is "twenty-eight million, six hundred eighty-nine thousand, six hundred seventy-eight".