28861427229 has 4 divisors (see below), whose sum is σ = 38481902976. Its totient is φ = 19240951484.

The previous prime is 28861427227. The next prime is 28861427261. The reversal of 28861427229 is 92272416882.

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 28861427229 - 2¹ = 28861427227 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28861427227) 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, 4810237869 + ... + 4810237874.

It is an arithmetic number, because the mean of its divisors is an integer number (9620475744).

Almost surely, 2^28861427229 is an apocalyptic number.

It is an amenable number.

28861427229 is a deficient number, since it is larger than the sum of its proper divisors (9620475747).

28861427229 is an equidigital number, since it uses as much as digits as its factorization.

28861427229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9620475746.

The product of its digits is 1548288, while the sum is 51.

The spelling of 28861427229 in words is "twenty-eight billion, eight hundred sixty-one million, four hundred twenty-seven thousand, two hundred twenty-nine".