28408241 has 4 divisors (see below), whose sum is σ = 30079332. Its totient is φ = 26737152.

The previous prime is 28408231. The next prime is 28408253. The reversal of 28408241 is 14280482.

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 21669025 + 6739216 = 4655^2 + 2596^2 .

It is a cyclic number.

It is not a de Polignac number, because 28408241 - 2¹⁰ = 28407217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28408231) 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, 835520 + ... + 835553.

It is an arithmetic number, because the mean of its divisors is an integer number (7519833).

Almost surely, 2^28408241 is an apocalyptic number.

It is an amenable number.

28408241 is a deficient number, since it is larger than the sum of its proper divisors (1671091).

28408241 is a wasteful number, since it uses less digits than its factorization.

28408241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671090.

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 28408241 is about 5329.9381797541. The cubic root of 28408241 is about 305.1275682434.

The spelling of 28408241 in words is "twenty-eight million, four hundred eight thousand, two hundred forty-one".