28752233 has 4 divisors (see below), whose sum is σ = 28913040. Its totient is φ = 28591428.

The previous prime is 28752211. The next prime is 28752239. The reversal of 28752233 is 33225782.

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, and also an emirpimes, since its reverse is a distinct semiprime: 33225782 = 2 ⋅16612891.

It is a cyclic number.

It is not a de Polignac number, because 28752233 - 2⁸ = 28751977 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28752233.

It is not an unprimeable number, because it can be changed into a prime (28752239) 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, 80135 + ... + 80492.

It is an arithmetic number, because the mean of its divisors is an integer number (7228260).

Almost surely, 2^28752233 is an apocalyptic number.

It is an amenable number.

28752233 is a deficient number, since it is larger than the sum of its proper divisors (160807).

28752233 is a wasteful number, since it uses less digits than its factorization.

28752233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160806.

The product of its digits is 20160, while the sum is 32.

The square root of 28752233 is about 5362.1108716624. The cubic root of 28752233 is about 306.3542148170.

The spelling of 28752233 in words is "twenty-eight million, seven hundred fifty-two thousand, two hundred thirty-three".