28357875437 has 4 divisors (see below), whose sum is σ = 28633194720. Its totient is φ = 28082556156.

The previous prime is 28357875401. The next prime is 28357875439. The reversal of 28357875437 is 73457875382.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73457875382 = 2 ⋅36728937691.

It is a cyclic number.

It is not a de Polignac number, because 28357875437 - 2⁸ = 28357875181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28357875439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137659487 + ... + 137659692.

It is an arithmetic number, because the mean of its divisors is an integer number (7158298680).

Almost surely, 2^28357875437 is an apocalyptic number.

It is an amenable number.

28357875437 is a deficient number, since it is larger than the sum of its proper divisors (275319283).

28357875437 is a wasteful number, since it uses less digits than its factorization.

28357875437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275319282.

The product of its digits is 39513600, while the sum is 59.

The spelling of 28357875437 in words is "twenty-eight billion, three hundred fifty-seven million, eight hundred seventy-five thousand, four hundred thirty-seven".