28198871 has 8 divisors (see below), whose sum is σ = 29213184. Its totient is φ = 27191160.

The previous prime is 28198853. The next prime is 28198931. The reversal of 28198871 is 17889182.

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 28198871 - 2¹⁰ = 28197847 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 (28198571) 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, 8036 + ... + 10998.

It is an arithmetic number, because the mean of its divisors is an integer number (3651648).

Almost surely, 2^28198871 is an apocalyptic number.

28198871 is a deficient number, since it is larger than the sum of its proper divisors (1014313).

28198871 is a wasteful number, since it uses less digits than its factorization.

28198871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301.

The product of its digits is 64512, while the sum is 44.

The square root of 28198871 is about 5310.2609163769. The cubic root of 28198871 is about 304.3761178837.

The spelling of 28198871 in words is "twenty-eight million, one hundred ninety-eight thousand, eight hundred seventy-one".