28444275 has 36 divisors (see below), whose sum is σ = 51319632. Its totient is φ = 15059520.

The previous prime is 28444271. The next prime is 28444279. The reversal of 28444275 is 57244482.

It is an interprime number because it is at equal distance from previous prime (28444271) and next prime (28444279).

It is not a de Polignac number, because 28444275 - 2² = 28444271 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28444271) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 37197 + ... + 37953.

Almost surely, 2^28444275 is an apocalyptic number.

28444275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28444275 is a deficient number, since it is larger than the sum of its proper divisors (22875357).

28444275 is a wasteful number, since it uses less digits than its factorization.

28444275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940 (or 932 counting only the distinct ones).

The product of its digits is 71680, while the sum is 36.

The square root of 28444275 is about 5333.3174478930. The cubic root of 28444275 is about 305.2565252043.

The spelling of 28444275 in words is "twenty-eight million, four hundred forty-four thousand, two hundred seventy-five".