28127145 has 8 divisors (see below), whose sum is σ = 45003456. Its totient is φ = 15001136.

The previous prime is 28127111. The next prime is 28127159. The reversal of 28127145 is 54172182.

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

It is a cyclic number.

It is not a de Polignac number, because 28127145 - 2¹⁰ = 28126121 is a prime.

It is a super-2 number, since 2×28127145² = 1582272571702050, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 937557 + ... + 937586.

It is an arithmetic number, because the mean of its divisors is an integer number (5625432).

Almost surely, 2^28127145 is an apocalyptic number.

It is an amenable number.

28127145 is a deficient number, since it is larger than the sum of its proper divisors (16876311).

28127145 is a wasteful number, since it uses less digits than its factorization.

28127145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1875151.

The product of its digits is 4480, while the sum is 30.

The square root of 28127145 is about 5303.5030875828. The cubic root of 28127145 is about 304.1178307367.

The spelling of 28127145 in words is "twenty-eight million, one hundred twenty-seven thousand, one hundred forty-five".