28103844261 has 4 divisors (see below), whose sum is σ = 37471792352. Its totient is φ = 18735896172.

The previous prime is 28103844227. The next prime is 28103844317. The reversal of 28103844261 is 16244830182.

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 not a de Polignac number, because 28103844261 - 2¹⁵ = 28103811493 is a prime.

It is a super-2 number, since 2×28103844261² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28103846261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4683974041 + ... + 4683974046.

It is an arithmetic number, because the mean of its divisors is an integer number (9367948088).

Almost surely, 2^28103844261 is an apocalyptic number.

It is an amenable number.

28103844261 is a deficient number, since it is larger than the sum of its proper divisors (9367948091).

28103844261 is an equidigital number, since it uses as much as digits as its factorization.

28103844261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9367948090.

The product of its (nonzero) digits is 73728, while the sum is 39.

The spelling of 28103844261 in words is "twenty-eight billion, one hundred three million, eight hundred forty-four thousand, two hundred sixty-one".