28728826 has 8 divisors (see below), whose sum is σ = 49249440. Its totient is φ = 12312348.

The previous prime is 28728787. The next prime is 28728851. The reversal of 28728826 is 62882782.

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

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, 1026016 + ... + 1026043.

It is an arithmetic number, because the mean of its divisors is an integer number (6156180).

Almost surely, 2^28728826 is an apocalyptic number.

28728826 is a deficient number, since it is larger than the sum of its proper divisors (20520614).

28728826 is a wasteful number, since it uses less digits than its factorization.

28728826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052068.

The product of its digits is 172032, while the sum is 43.

The square root of 28728826 is about 5359.9277980212. The cubic root of 28728826 is about 306.2710586102.

The spelling of 28728826 in words is "twenty-eight million, seven hundred twenty-eight thousand, eight hundred twenty-six".