28357441 has 4 divisors (see below), whose sum is σ = 32408512. Its totient is φ = 24306372.

The previous prime is 28357423. The next prime is 28357453. The reversal of 28357441 is 14475382.

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 not a de Polignac number, because 28357441 - 2⁵ = 28357409 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28357397 and 28357406.

It is not an unprimeable number, because it can be changed into a prime (28357421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025525 + ... + 2025538.

It is an arithmetic number, because the mean of its divisors is an integer number (8102128).

Almost surely, 2^28357441 is an apocalyptic number.

It is an amenable number.

28357441 is a deficient number, since it is larger than the sum of its proper divisors (4051071).

28357441 is an equidigital number, since it uses as much as digits as its factorization.

28357441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051070.

The product of its digits is 26880, while the sum is 34.

The square root of 28357441 is about 5325.1705137019. The cubic root of 28357441 is about 304.9455819782.

The spelling of 28357441 in words is "twenty-eight million, three hundred fifty-seven thousand, four hundred forty-one".