28817242 has 8 divisors (see below), whose sum is σ = 44716500. Its totient is φ = 13911744.

The previous prime is 28817233. The next prime is 28817273. The reversal of 28817242 is 24271882.

It can be written as a sum of positive squares in 2 ways, for example, as 28633201 + 184041 = 5351^2 + 429^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28817198 and 28817207.

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, 248367 + ... + 248482.

Almost surely, 2^28817242 is an apocalyptic number.

28817242 is a deficient number, since it is larger than the sum of its proper divisors (15899258).

28817242 is a wasteful number, since it uses less digits than its factorization.

28817242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496880.

The product of its digits is 14336, while the sum is 34.

The square root of 28817242 is about 5368.1693341399. The cubic root of 28817242 is about 306.5849306953.

The spelling of 28817242 in words is "twenty-eight million, eight hundred seventeen thousand, two hundred forty-two".