28249227636 has 24 divisors (see below), whose sum is σ = 75331273920. Its totient is φ = 8071207872.

The previous prime is 28249227631. The next prime is 28249227637. The reversal of 28249227636 is 63672294282.

It is a super-2 number, since 2×28249227636² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28249227631) 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, 168150081 + ... + 168150248.

It is an arithmetic number, because the mean of its divisors is an integer number (3138803080).

Almost surely, 2^28249227636 is an apocalyptic number.

It is an amenable number.

28249227636 is an abundant number, since it is smaller than the sum of its proper divisors (47082046284).

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

28249227636 is a wasteful number, since it uses less digits than its factorization.

28249227636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336300343 (or 336300341 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The spelling of 28249227636 in words is "twenty-eight billion, two hundred forty-nine million, two hundred twenty-seven thousand, six hundred thirty-six".