28508241 has 8 divisors (see below), whose sum is σ = 39038464. Its totient is φ = 18491760.

The previous prime is 28508231. The next prime is 28508261. The reversal of 28508241 is 14280582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28508241 - 2⁵ = 28508209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28508199 and 28508208.

It is not an unprimeable number, because it can be changed into a prime (28508231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128305 + ... + 128526.

It is an arithmetic number, because the mean of its divisors is an integer number (4879808).

Almost surely, 2^28508241 is an apocalyptic number.

It is an amenable number.

28508241 is a deficient number, since it is larger than the sum of its proper divisors (10530223).

28508241 is a wasteful number, since it uses less digits than its factorization.

28508241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256871.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 28508241 is about 5339.3109105951. The cubic root of 28508241 is about 305.4851760231.

The spelling of 28508241 in words is "twenty-eight million, five hundred eight thousand, two hundred forty-one".