28137508973 has 12 divisors (see below), whose sum is σ = 32775014592. Its totient is φ = 24085719000.

The previous prime is 28137508961. The next prime is 28137509009. The reversal of 28137508973 is 37980573182.

It is not a de Polignac number, because 28137508973 - 2²⁰ = 28136460397 is a prime.

It is a super-2 number, since 2×28137508973² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28137508943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 345515 + ... + 419112.

It is an arithmetic number, because the mean of its divisors is an integer number (2731251216).

Almost surely, 2^28137508973 is an apocalyptic number.

It is an amenable number.

28137508973 is a deficient number, since it is larger than the sum of its proper divisors (4637505619).

28137508973 is an equidigital number, since it uses as much as digits as its factorization.

28137508973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765392 (or 765385 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 28137508973 in words is "twenty-eight billion, one hundred thirty-seven million, five hundred eight thousand, nine hundred seventy-three".