28109941 has 4 divisors (see below), whose sum is σ = 28278432. Its totient is φ = 27941452.

The previous prime is 28109929. The next prime is 28109947. The reversal of 28109941 is 14990182.

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 28109941 - 2¹⁵ = 28077173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28109897 and 28109906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28109947) 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, 83995 + ... + 84328.

It is an arithmetic number, because the mean of its divisors is an integer number (7069608).

Almost surely, 2^28109941 is an apocalyptic number.

It is an amenable number.

28109941 is a deficient number, since it is larger than the sum of its proper divisors (168491).

28109941 is a wasteful number, since it uses less digits than its factorization.

28109941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168490.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 28109941 is about 5301.8808926644. The cubic root of 28109941 is about 304.0558134191.

The spelling of 28109941 in words is "twenty-eight million, one hundred nine thousand, nine hundred forty-one".