28357850137 has 4 divisors (see below), whose sum is σ = 28391650560. Its totient is φ = 28324049716.

The previous prime is 28357850123. The next prime is 28357850201. The reversal of 28357850137 is 73105875382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28357850137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28357850737) 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, 16898953 + ... + 16900630.

It is an arithmetic number, because the mean of its divisors is an integer number (7097912640).

Almost surely, 2^28357850137 is an apocalyptic number.

It is an amenable number.

28357850137 is a deficient number, since it is larger than the sum of its proper divisors (33800423).

28357850137 is an equidigital number, since it uses as much as digits as its factorization.

28357850137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33800422.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 28357850137 in words is "twenty-eight billion, three hundred fifty-seven million, eight hundred fifty thousand, one hundred thirty-seven".