28312437173 has 8 divisors (see below), whose sum is σ = 29290966680. Its totient is φ = 27334056960.

The previous prime is 28312437157. The next prime is 28312437217. The reversal of 28312437173 is 37173421382.

It can be written as a sum of positive squares in 4 ways, for example, as 14846691409 + 13465745764 = 121847^2 + 116042^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28312437173 - 2⁴ = 28312437157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28312437173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28312437473) 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, 461861 + ... + 519557.

It is an arithmetic number, because the mean of its divisors is an integer number (3661370835).

Almost surely, 2^28312437173 is an apocalyptic number.

It is an amenable number.

28312437173 is a deficient number, since it is larger than the sum of its proper divisors (978529507).

28312437173 is a wasteful number, since it uses less digits than its factorization.

28312437173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74647.

The product of its digits is 169344, while the sum is 41.

The spelling of 28312437173 in words is "twenty-eight billion, three hundred twelve million, four hundred thirty-seven thousand, one hundred seventy-three".