28485198211 has 4 divisors (see below), whose sum is σ = 28486413424. Its totient is φ = 28483983000.

The previous prime is 28485198187. The next prime is 28485198227. The reversal of 28485198211 is 11289158482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28485198211 - 2¹⁹ = 28484673923 is a prime.

It is a super-2 number, since 2×28485198211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28485198281) 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, 571740 + ... + 619561.

It is an arithmetic number, because the mean of its divisors is an integer number (7121603356).

Almost surely, 2^28485198211 is an apocalyptic number.

28485198211 is a deficient number, since it is larger than the sum of its proper divisors (1215213).

28485198211 is a wasteful number, since it uses less digits than its factorization.

28485198211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215212.

The product of its digits is 368640, while the sum is 49.

The spelling of 28485198211 in words is "twenty-eight billion, four hundred eighty-five million, one hundred ninety-eight thousand, two hundred eleven".