28140217448 has 48 divisors (see below), whose sum is σ = 61437560580. Its totient is φ = 12048244992.

The previous prime is 28140217433. The next prime is 28140217471. The reversal of 28140217448 is 84471204182.

It can be written as a sum of positive squares in 2 ways, for example, as 18544447684 + 9595769764 = 136178^2 + 97958^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 370190 + ... + 439682.

Almost surely, 2^28140217448 is an apocalyptic number.

28140217448 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28140217448 is an abundant number, since it is smaller than the sum of its proper divisors (33297343132).

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

28140217448 is a wasteful number, since it uses less digits than its factorization.

28140217448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70546 (or 70535 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 41.

The spelling of 28140217448 in words is "twenty-eight billion, one hundred forty million, two hundred seventeen thousand, four hundred forty-eight".