28643271441 has 4 divisors (see below), whose sum is σ = 38191028592. Its totient is φ = 19095514292.

The previous prime is 28643271409. The next prime is 28643271451. The reversal of 28643271441 is 14417234682.

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 28643271441 - 2⁵ = 28643271409 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28643271393 and 28643271402.

It is not an unprimeable number, because it can be changed into a prime (28643271451) 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, 4773878571 + ... + 4773878576.

It is an arithmetic number, because the mean of its divisors is an integer number (9547757148).

Almost surely, 2^28643271441 is an apocalyptic number.

It is an amenable number.

28643271441 is a deficient number, since it is larger than the sum of its proper divisors (9547757151).

28643271441 is an equidigital number, since it uses as much as digits as its factorization.

28643271441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547757150.

The product of its digits is 258048, while the sum is 42.

The spelling of 28643271441 in words is "twenty-eight billion, six hundred forty-three million, two hundred seventy-one thousand, four hundred forty-one".