28027503030257 has 4 divisors (see below), whose sum is σ = 28993968652020. Its totient is φ = 27061037408496.

The previous prime is 28027503030253. The next prime is 28027503030259. The reversal of 28027503030257 is 75203030572082.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20306640551521 + 7720862478736 = 4506289^2 + 2778644^2 .

It is a cyclic number.

It is not a de Polignac number, because 28027503030257 - 2² = 28027503030253 is a prime.

It is a super-2 number, since 2×28027503030257² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28027503030253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 483232810838 + ... + 483232810895.

It is an arithmetic number, because the mean of its divisors is an integer number (7248492163005).

Almost surely, 2^{28027503030257} is an apocalyptic number.

It is an amenable number.

28027503030257 is a deficient number, since it is larger than the sum of its proper divisors (966465621763).

28027503030257 is an equidigital number, since it uses as much as digits as its factorization.

28027503030257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966465621762.

The product of its (nonzero) digits is 705600, while the sum is 44.

The spelling of 28027503030257 in words is "twenty-eight trillion, twenty-seven billion, five hundred three million, thirty thousand, two hundred fifty-seven".