28775241 has 12 divisors (see below), whose sum is σ = 45342960. Its totient is φ = 17439480.

The previous prime is 28775239. The next prime is 28775261. The reversal of 28775241 is 14257782.

It is not a de Polignac number, because 28775241 - 2¹ = 28775239 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28775196 and 28775205.

It is not an unprimeable number, because it can be changed into a prime (28775261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145231 + ... + 145428.

It is an arithmetic number, because the mean of its divisors is an integer number (3778580).

Almost surely, 2^28775241 is an apocalyptic number.

It is an amenable number.

28775241 is a deficient number, since it is larger than the sum of its proper divisors (16567719).

28775241 is a wasteful number, since it uses less digits than its factorization.

28775241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290676 (or 290673 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 28775241 is about 5364.2558663807. The cubic root of 28775241 is about 306.4359095556.

It can be divided in two parts, 2877 and 5241, that added together give a palindrome (8118).

The spelling of 28775241 in words is "twenty-eight million, seven hundred seventy-five thousand, two hundred forty-one".