28270000257 has 32 divisors (see below), whose sum is σ = 38967841152. Its totient is φ = 18216566784.

The previous prime is 28270000181. The next prime is 28270000259. The reversal of 28270000257 is 75200007282.

It is not a de Polignac number, because 28270000257 - 2¹¹ = 28269998209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28270000259) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12636343 + ... + 12638579.

It is an arithmetic number, because the mean of its divisors is an integer number (1217745036).

Almost surely, 2^28270000257 is an apocalyptic number.

It is an amenable number.

28270000257 is a deficient number, since it is larger than the sum of its proper divisors (10697840895).

28270000257 is a wasteful number, since it uses less digits than its factorization.

28270000257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2977.

The product of its (nonzero) digits is 15680, while the sum is 33.

The spelling of 28270000257 in words is "twenty-eight billion, two hundred seventy million, two hundred fifty-seven", and thus it is an aban number.