28752241 has 8 divisors (see below), whose sum is σ = 32906304. Its totient is φ = 24609840.

The previous prime is 28752239. The next prime is 28752257. The reversal of 28752241 is 14225782.

It is a happy number.

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 28752241 - 2¹ = 28752239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28752211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3246 + ... + 8248.

It is an arithmetic number, because the mean of its divisors is an integer number (4113288).

Almost surely, 2^28752241 is an apocalyptic number.

It is an amenable number.

28752241 is a deficient number, since it is larger than the sum of its proper divisors (4154063).

28752241 is an equidigital number, since it uses as much as digits as its factorization.

28752241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5831.

The product of its digits is 8960, while the sum is 31.

The square root of 28752241 is about 5362.1116176372. Note that the first 3 decimals coincide. The cubic root of 28752241 is about 306.3542432302.

The spelling of 28752241 in words is "twenty-eight million, seven hundred fifty-two thousand, two hundred forty-one".