28407241 has 4 divisors (see below), whose sum is σ = 28478484. Its totient is φ = 28336000.

The previous prime is 28407227. The next prime is 28407259. The reversal of 28407241 is 14270482.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 5405625 = 4796^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 28407241 - 2¹⁵ = 28374473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28407271) 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, 35020 + ... + 35821.

It is an arithmetic number, because the mean of its divisors is an integer number (7119621).

Almost surely, 2^28407241 is an apocalyptic number.

It is an amenable number.

28407241 is a deficient number, since it is larger than the sum of its proper divisors (71243).

28407241 is an equidigital number, since it uses as much as digits as its factorization.

28407241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71242.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 28407241 is about 5329.8443692100. The cubic root of 28407241 is about 305.1239879308.

The spelling of 28407241 in words is "twenty-eight million, four hundred seven thousand, two hundred forty-one".