28172603585 has 8 divisors (see below), whose sum is σ = 38636713536. Its totient is φ = 19318356720.

The previous prime is 28172603579. The next prime is 28172603587. The reversal of 28172603585 is 58530627182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28172603585 - 2¹² = 28172599489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28172603587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 402465731 + ... + 402465800.

It is an arithmetic number, because the mean of its divisors is an integer number (4829589192).

Almost surely, 2^28172603585 is an apocalyptic number.

It is an amenable number.

28172603585 is a deficient number, since it is larger than the sum of its proper divisors (10464109951).

28172603585 is an equidigital number, since it uses as much as digits as its factorization.

28172603585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804931543.

The product of its (nonzero) digits is 806400, while the sum is 47.

The spelling of 28172603585 in words is "twenty-eight billion, one hundred seventy-two million, six hundred three thousand, five hundred eighty-five".