28275557228 has 6 divisors (see below), whose sum is σ = 49482225156. Its totient is φ = 14137778612.

The previous prime is 28275557227. The next prime is 28275557231. The reversal of 28275557228 is 82275557282.

It is a self number, because there is not a number n which added to its sum of digits gives 28275557228.

It is not an unprimeable number, because it can be changed into a prime (28275557227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3534444650 + ... + 3534444657.

It is an arithmetic number, because the mean of its divisors is an integer number (8247037526).

Almost surely, 2^28275557228 is an apocalyptic number.

It is an amenable number.

28275557228 is a deficient number, since it is larger than the sum of its proper divisors (21206667928).

28275557228 is a wasteful number, since it uses less digits than its factorization.

28275557228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7068889311 (or 7068889309 counting only the distinct ones).

The product of its digits is 6272000, while the sum is 53.

The spelling of 28275557228 in words is "twenty-eight billion, two hundred seventy-five million, five hundred fifty-seven thousand, two hundred twenty-eight".