28678506 has 32 divisors (see below), whose sum is σ = 60730560. Its totient is φ = 9012864.

The previous prime is 28678483. The next prime is 28678511. The reversal of 28678506 is 60587682.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5566 + ... + 9398.

It is an arithmetic number, because the mean of its divisors is an integer number (1897830).

Almost surely, 2^28678506 is an apocalyptic number.

28678506 is an abundant number, since it is smaller than the sum of its proper divisors (32052054).

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

28678506 is a wasteful number, since it uses less digits than its factorization.

28678506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 28678506 is about 5355.2316476507. The cubic root of 28678506 is about 306.0921376607.

The spelling of 28678506 in words is "twenty-eight million, six hundred seventy-eight thousand, five hundred six".