28210013668228 has 48 divisors (see below), whose sum is σ = 58387220648064. Its totient is φ = 11673453093120.

The previous prime is 28210013668181. The next prime is 28210013668229. The reversal of 28210013668228 is 82286631001282.

It is a happy number.

It is a super-2 number, since 2×28210013668228² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28210013668229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103794601 + ... + 104066032.

It is an arithmetic number, because the mean of its divisors is an integer number (1216400430168).

Almost surely, 2^{28210013668228} is an apocalyptic number.

28210013668228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28210013668228 is an abundant number, since it is smaller than the sum of its proper divisors (30177206979836).

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

28210013668228 is a wasteful number, since it uses less digits than its factorization.

28210013668228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207860812 (or 207860810 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 49.

The spelling of 28210013668228 in words is "twenty-eight trillion, two hundred ten billion, thirteen million, six hundred sixty-eight thousand, two hundred twenty-eight".