28944075 has 24 divisors (see below), whose sum is σ = 48340656. Its totient is φ = 15280000.

The previous prime is 28944053. The next prime is 28944077. The reversal of 28944075 is 57044982.

It is not a de Polignac number, because 28944075 - 2⁷ = 28943947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28944077) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5665 + ... + 9485.

It is an arithmetic number, because the mean of its divisors is an integer number (2014194).

Almost surely, 2^28944075 is an apocalyptic number.

28944075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28944075 is a deficient number, since it is larger than the sum of its proper divisors (19396581).

28944075 is a wasteful number, since it uses less digits than its factorization.

28944075 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935 (or 3930 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28944075 is about 5379.9697954542. The cubic root of 28944075 is about 307.0340620109.

The spelling of 28944075 in words is "twenty-eight million, nine hundred forty-four thousand, seventy-five".