28057798173 has 4 divisors (see below), whose sum is σ = 37410397568. Its totient is φ = 18705198780.

The previous prime is 28057798073. The next prime is 28057798177. The reversal of 28057798173 is 37189775082.

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 not a de Polignac number, because 28057798173 - 2²⁹ = 27520927261 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 (28057798177) 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, 4676299693 + ... + 4676299698.

It is an arithmetic number, because the mean of its divisors is an integer number (9352599392).

Almost surely, 2^28057798173 is an apocalyptic number.

It is an amenable number.

28057798173 is a deficient number, since it is larger than the sum of its proper divisors (9352599395).

28057798173 is an equidigital number, since it uses as much as digits as its factorization.

28057798173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9352599394.

The product of its (nonzero) digits is 5927040, while the sum is 57.

The spelling of 28057798173 in words is "twenty-eight billion, fifty-seven million, seven hundred ninety-eight thousand, one hundred seventy-three".