28288734 has 8 divisors (see below), whose sum is σ = 56577480. Its totient is φ = 9429576.

The previous prime is 28288703. The next prime is 28288747. The reversal of 28288734 is 43788282.

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

28288734 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2357389 + ... + 2357400.

It is an arithmetic number, because the mean of its divisors is an integer number (7072185).

Almost surely, 2^28288734 is an apocalyptic number.

28288734 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.

28288734 is a wasteful number, since it uses less digits than its factorization.

28288734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714794.

The product of its digits is 172032, while the sum is 42.

The square root of 28288734 is about 5318.7154464213. The cubic root of 28288734 is about 304.6990994611.

The spelling of 28288734 in words is "twenty-eight million, two hundred eighty-eight thousand, seven hundred thirty-four".