28845637477 has 4 divisors (see below), whose sum is σ = 28893794400. Its totient is φ = 28797480556.

The previous prime is 28845637459. The next prime is 28845637481. The reversal of 28845637477 is 77473654882.

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 not a de Polignac number, because 28845637477 - 2²⁷ = 28711419749 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 (28845635477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24077563 + ... + 24078760.

It is an arithmetic number, because the mean of its divisors is an integer number (7223448600).

Almost surely, 2^28845637477 is an apocalyptic number.

It is an amenable number.

28845637477 is a deficient number, since it is larger than the sum of its proper divisors (48156923).

28845637477 is an equidigital number, since it uses as much as digits as its factorization.

28845637477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48156922.

The product of its digits is 63221760, while the sum is 61.

The spelling of 28845637477 in words is "twenty-eight billion, eight hundred forty-five million, six hundred thirty-seven thousand, four hundred seventy-seven".