28751701797 has 180 divisors, whose sum is σ = 56055190880. Its totient is φ = 13872104064.

The previous prime is 28751701763. The next prime is 28751701801. The reversal of 28751701797 is 79710715782.

28751701797 is a `hidden beast` number, since 28 + 7 + 517 + 0 + 17 + 97 = 666.

It is not a de Polignac number, because 28751701797 - 2¹² = 28751697701 is a prime.

It is a super-2 number, since 2×28751701797² (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 (28751701597) by changing a digit.

It is a polite number, since it can be written in 179 ways as a sum of consecutive naturals, for example, 991437979 + ... + 991438007.

Almost surely, 2^28751701797 is an apocalyptic number.

It is an amenable number.

28751701797 is a deficient number, since it is larger than the sum of its proper divisors (27303489083).

28751701797 is an equidigital number, since it uses as much as digits as its factorization.

28751701797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 71 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 54.

The spelling of 28751701797 in words is "twenty-eight billion, seven hundred fifty-one million, seven hundred one thousand, seven hundred ninety-seven".