28215057133257 has 8 divisors (see below), whose sum is σ = 37648948075584. Its totient is φ = 18795602139888.

The previous prime is 28215057133253. The next prime is 28215057133259. The reversal of 28215057133257 is 75233175051282.

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

It is not a de Polignac number, because 28215057133257 - 2² = 28215057133253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28215057133253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3608982678 + ... + 3608990495.

It is an arithmetic number, because the mean of its divisors is an integer number (4706118509448).

Almost surely, 2^{28215057133257} is an apocalyptic number.

It is an amenable number.

28215057133257 is a deficient number, since it is larger than the sum of its proper divisors (9433890942327).

28215057133257 is a wasteful number, since it uses less digits than its factorization.

28215057133257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7217974479.

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 28215057133257 in words is "twenty-eight trillion, two hundred fifteen billion, fifty-seven million, one hundred thirty-three thousand, two hundred fifty-seven".