28198715 has 8 divisors (see below), whose sum is σ = 34315488. Its totient is φ = 22240960.

The previous prime is 28198691. The next prime is 28198727. The reversal of 28198715 is 51789182.

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

It is not a de Polignac number, because 28198715 - 2²⁴ = 11421499 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39362 + ... + 40071.

It is an arithmetic number, because the mean of its divisors is an integer number (4289436).

Almost surely, 2^28198715 is an apocalyptic number.

28198715 is a deficient number, since it is larger than the sum of its proper divisors (6116773).

28198715 is an equidigital number, since it uses as much as digits as its factorization.

28198715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79509.

The product of its digits is 40320, while the sum is 41.

The square root of 28198715 is about 5310.2462278128. The cubic root of 28198715 is about 304.3755565993.

The spelling of 28198715 in words is "twenty-eight million, one hundred ninety-eight thousand, seven hundred fifteen".