28744242 has 8 divisors (see below), whose sum is σ = 57488496. Its totient is φ = 9581412.

The previous prime is 28744231. The next prime is 28744259. The reversal of 28744242 is 24244782.

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

28744242 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395348 + ... + 2395359.

It is an arithmetic number, because the mean of its divisors is an integer number (7186062).

Almost surely, 2^28744242 is an apocalyptic number.

28744242 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.

28744242 is a wasteful number, since it uses less digits than its factorization.

28744242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790712.

The product of its digits is 28672, while the sum is 33.

The square root of 28744242 is about 5361.3656842264. The cubic root of 28744242 is about 306.3258308956.

The spelling of 28744242 in words is "twenty-eight million, seven hundred forty-four thousand, two hundred forty-two".