28229637229 has 4 divisors (see below), whose sum is σ = 29140270720. Its totient is φ = 27319003740.

The previous prime is 28229637209. The next prime is 28229637263. The reversal of 28229637229 is 92273692282.

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 28229637229 - 2¹⁷ = 28229506157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28229637209) 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, 455316699 + ... + 455316760.

It is an arithmetic number, because the mean of its divisors is an integer number (7285067680).

Almost surely, 2^28229637229 is an apocalyptic number.

It is an amenable number.

28229637229 is a deficient number, since it is larger than the sum of its proper divisors (910633491).

28229637229 is an equidigital number, since it uses as much as digits as its factorization.

28229637229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 910633490.

The product of its digits is 2612736, while the sum is 52.

The spelling of 28229637229 in words is "twenty-eight billion, two hundred twenty-nine million, six hundred thirty-seven thousand, two hundred twenty-nine".