28206671244 has 24 divisors (see below), whose sum is σ = 68085069360. Its totient is φ = 9078009024.

The previous prime is 28206671243. The next prime is 28206671249. The reversal of 28206671244 is 44217660282.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28206671196 and 28206671205.

It is not an unprimeable number, because it can be changed into a prime (28206671243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40526479 + ... + 40527174.

It is an arithmetic number, because the mean of its divisors is an integer number (2836877890).

Almost surely, 2^28206671244 is an apocalyptic number.

It is an amenable number.

28206671244 is an abundant number, since it is smaller than the sum of its proper divisors (39878398116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28206671244 is a wasteful number, since it uses less digits than its factorization.

28206671244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81053689 (or 81053687 counting only the distinct ones).

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

The spelling of 28206671244 in words is "twenty-eight billion, two hundred six million, six hundred seventy-one thousand, two hundred forty-four".