28642873 has 8 divisors (see below), whose sum is σ = 32775680. Its totient is φ = 24520320.

The previous prime is 28642871. The next prime is 28642877. The reversal of 28642873 is 37824682.

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 28642873 - 2¹ = 28642871 is a prime.

It is a super-3 number, since 3×28642873³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28642871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873 + ... + 9001.

It is an arithmetic number, because the mean of its divisors is an integer number (4096960).

Almost surely, 2^28642873 is an apocalyptic number.

It is an amenable number.

28642873 is a deficient number, since it is larger than the sum of its proper divisors (4132807).

28642873 is an equidigital number, since it uses as much as digits as its factorization.

28642873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5127.

The product of its digits is 129024, while the sum is 40.

The square root of 28642873 is about 5351.9036800002. The cubic root of 28642873 is about 305.9653121145.

The spelling of 28642873 in words is "twenty-eight million, six hundred forty-two thousand, eight hundred seventy-three".