28278606 has 24 divisors (see below), whose sum is σ = 57925800. Its totient is φ = 9203376.

The previous prime is 28278587. The next prime is 28278617. The reversal of 28278606 is 60687282.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9820 + ... + 12368.

It is an arithmetic number, because the mean of its divisors is an integer number (2413575).

Almost surely, 2^28278606 is an apocalyptic number.

28278606 is an abundant number, since it is smaller than the sum of its proper divisors (29647194).

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

28278606 is a wasteful number, since it uses less digits than its factorization.

28278606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2597 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 28278606 is about 5317.7632515937. The cubic root of 28278606 is about 304.6627320879.

The spelling of 28278606 in words is "twenty-eight million, two hundred seventy-eight thousand, six hundred six".