28944253 has 8 divisors (see below), whose sum is σ = 31345496. Its totient is φ = 26568000.

The previous prime is 28944247. The next prime is 28944259. The reversal of 28944253 is 35244982.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28944247) and next prime (28944259).

It can be written as a sum of positive squares in 4 ways, for example, as 1350244 + 27594009 = 1162^2 + 5253^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28944253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28944259) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3798 + ... + 8503.

It is an arithmetic number, because the mean of its divisors is an integer number (3918187).

Almost surely, 2^28944253 is an apocalyptic number.

It is an amenable number.

28944253 is a deficient number, since it is larger than the sum of its proper divisors (2401243).

28944253 is a wasteful number, since it uses less digits than its factorization.

28944253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495.

The product of its digits is 69120, while the sum is 37.

The square root of 28944253 is about 5379.9863382726. The cubic root of 28944253 is about 307.0346914080.

The spelling of 28944253 in words is "twenty-eight million, nine hundred forty-four thousand, two hundred fifty-three".