28671873 has 4 divisors (see below), whose sum is σ = 38229168. Its totient is φ = 19114580.

The previous prime is 28671871. The next prime is 28671899. The reversal of 28671873 is 37817682.

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 28671873 - 2¹ = 28671871 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28671871) 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, 4778643 + ... + 4778648.

It is an arithmetic number, because the mean of its divisors is an integer number (9557292).

Almost surely, 2^28671873 is an apocalyptic number.

It is an amenable number.

28671873 is a deficient number, since it is larger than the sum of its proper divisors (9557295).

28671873 is an equidigital number, since it uses as much as digits as its factorization.

28671873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9557294.

The product of its digits is 112896, while the sum is 42.

The square root of 28671873 is about 5354.6123108961. The cubic root of 28671873 is about 306.0685373414.

The spelling of 28671873 in words is "twenty-eight million, six hundred seventy-one thousand, eight hundred seventy-three".