28286071257 has 8 divisors (see below), whose sum is σ = 38634634080. Its totient is φ = 18397444640.

The previous prime is 28286071213. The next prime is 28286071279. The reversal of 28286071257 is 75217068282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28286071257 - 2¹⁰ = 28286070233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28286071657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114983907 + ... + 114984152.

It is an arithmetic number, because the mean of its divisors is an integer number (4829329260).

Almost surely, 2^28286071257 is an apocalyptic number.

It is an amenable number.

28286071257 is a deficient number, since it is larger than the sum of its proper divisors (10348562823).

28286071257 is a wasteful number, since it uses less digits than its factorization.

28286071257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229968103.

The product of its (nonzero) digits is 752640, while the sum is 48.

The spelling of 28286071257 in words is "twenty-eight billion, two hundred eighty-six million, seventy-one thousand, two hundred fifty-seven".