28359641 has 4 divisors (see below), whose sum is σ = 28373172. Its totient is φ = 28346112.

The previous prime is 28359631. The next prime is 28359671. The reversal of 28359641 is 14695382.

It is a happy number.

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 23088025 + 5271616 = 4805^2 + 2296^2 .

It is a cyclic number.

It is not a de Polignac number, because 28359641 - 2¹⁴ = 28343257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28359595 and 28359604.

It is not an unprimeable number, because it can be changed into a prime (28359631) 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, 2876 + ... + 8061.

It is an arithmetic number, because the mean of its divisors is an integer number (7093293).

Almost surely, 2^28359641 is an apocalyptic number.

It is an amenable number.

28359641 is a deficient number, since it is larger than the sum of its proper divisors (13531).

28359641 is a wasteful number, since it uses less digits than its factorization.

28359641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13530.

The product of its digits is 51840, while the sum is 38.

The square root of 28359641 is about 5325.3770758511. The cubic root of 28359641 is about 304.9534677735.

The spelling of 28359641 in words is "twenty-eight million, three hundred fifty-nine thousand, six hundred forty-one".