28042441 has 4 divisors (see below), whose sum is σ = 32048512. Its totient is φ = 24036372.

The previous prime is 28042397. The next prime is 28042447. The reversal of 28042441 is 14424082.

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 28042441 - 2¹³ = 28034249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28042447) 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, 2003025 + ... + 2003038.

It is an arithmetic number, because the mean of its divisors is an integer number (8012128).

Almost surely, 2^28042441 is an apocalyptic number.

It is an amenable number.

28042441 is a deficient number, since it is larger than the sum of its proper divisors (4006071).

28042441 is an equidigital number, since it uses as much as digits as its factorization.

28042441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4006070.

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 28042441 is about 5295.5114011774. The cubic root of 28042441 is about 303.8122433933.

The spelling of 28042441 in words is "twenty-eight million, forty-two thousand, four hundred forty-one".