28397757519 has 20 divisors (see below), whose sum is σ = 42427254144. Its totient is φ = 18929199744.

The previous prime is 28397757517. The next prime is 28397757533. The reversal of 28397757519 is 91575779382.

28397757519 is a `hidden beast` number, since 28 + 3 + 97 + 7 + 5 + 7 + 519 = 666.

It is not a de Polignac number, because 28397757519 - 2¹ = 28397757517 is a prime.

It is a super-2 number, since 2×28397757519² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28397757517) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 687634 + ... + 727760.

Almost surely, 2^28397757519 is an apocalyptic number.

28397757519 is a deficient number, since it is larger than the sum of its proper divisors (14029496625).

28397757519 is an equidigital number, since it uses as much as digits as its factorization.

28397757519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48876 (or 48867 counting only the distinct ones).

The product of its digits is 33339600, while the sum is 63.

The spelling of 28397757519 in words is "twenty-eight billion, three hundred ninety-seven million, seven hundred fifty-seven thousand, five hundred nineteen".