28127233 has 4 divisors (see below), whose sum is σ = 28274688. Its totient is φ = 27979780.

The previous prime is 28127221. The next prime is 28127249. The reversal of 28127233 is 33272182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28127233 is a prime.

It is a super-2 number, since 2×28127233² = 1582282472472578, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28127263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73441 + ... + 73822.

It is an arithmetic number, because the mean of its divisors is an integer number (7068672).

Almost surely, 2^28127233 is an apocalyptic number.

It is an amenable number.

28127233 is a deficient number, since it is larger than the sum of its proper divisors (147455).

28127233 is a wasteful number, since it uses less digits than its factorization.

28127233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147454.

The product of its digits is 4032, while the sum is 28.

The square root of 28127233 is about 5303.5113839795. The cubic root of 28127233 is about 304.1181478958.

The spelling of 28127233 in words is "twenty-eight million, one hundred twenty-seven thousand, two hundred thirty-three".