28857431717148 has 12 divisors (see below), whose sum is σ = 67334007340040. Its totient is φ = 9619143905712.

The previous prime is 28857431717099. The next prime is 28857431717167. The reversal of 28857431717148 is 84171713475882.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202392988203 + ... + 1202392988226.

Almost surely, 2^{28857431717148} is an apocalyptic number.

It is an amenable number.

28857431717148 is an abundant number, since it is smaller than the sum of its proper divisors (38476575622892).

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

28857431717148 is a wasteful number, since it uses less digits than its factorization.

28857431717148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2404785976436 (or 2404785976434 counting only the distinct ones).

The product of its digits is 84295680, while the sum is 66.

The spelling of 28857431717148 in words is "twenty-eight trillion, eight hundred fifty-seven billion, four hundred thirty-one million, seven hundred seventeen thousand, one hundred forty-eight".