28688574 has 8 divisors (see below), whose sum is σ = 57377160. Its totient is φ = 9562856.

The previous prime is 28688557. The next prime is 28688587. The reversal of 28688574 is 47588682.

It is a sphenic number, since it is the product of 3 distinct primes.

28688574 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2390709 + ... + 2390720.

It is an arithmetic number, because the mean of its divisors is an integer number (7172145).

Almost surely, 2^28688574 is an apocalyptic number.

28688574 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28688574 is a wasteful number, since it uses less digits than its factorization.

28688574 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781434.

The product of its digits is 860160, while the sum is 48.

The square root of 28688574 is about 5356.1715805228. The cubic root of 28688574 is about 306.1279528119.

The spelling of 28688574 in words is "twenty-eight million, six hundred eighty-eight thousand, five hundred seventy-four".