28544242 has 32 divisors (see below), whose sum is σ = 47453184. Its totient is φ = 12830400.

The previous prime is 28544239. The next prime is 28544249. The reversal of 28544242 is 24244582.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (28544249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52492 + ... + 53032.

It is an arithmetic number, because the mean of its divisors is an integer number (1482912).

Almost surely, 2^28544242 is an apocalyptic number.

28544242 is a deficient number, since it is larger than the sum of its proper divisors (18908942).

28544242 is a wasteful number, since it uses less digits than its factorization.

28544242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634.

The product of its digits is 20480, while the sum is 31.

The square root of 28544242 is about 5342.6811621133. The cubic root of 28544242 is about 305.6137136582.

The spelling of 28544242 in words is "twenty-eight million, five hundred forty-four thousand, two hundred forty-two".