28198365 has 32 divisors (see below), whose sum is σ = 49787136. Its totient is φ = 13539840.

The previous prime is 28198361. The next prime is 28198369. The reversal of 28198365 is 56389182.

It is an interprime number because it is at equal distance from previous prime (28198361) and next prime (28198369).

It is not a de Polignac number, because 28198365 - 2² = 28198361 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28198361) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6232 + ... + 9758.

It is an arithmetic number, because the mean of its divisors is an integer number (1555848).

Almost surely, 2^28198365 is an apocalyptic number.

It is an amenable number.

28198365 is a deficient number, since it is larger than the sum of its proper divisors (21588771).

28198365 is a wasteful number, since it uses less digits than its factorization.

28198365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589.

The product of its digits is 103680, while the sum is 42.

The square root of 28198365 is about 5310.2132725532. The cubic root of 28198365 is about 304.3742972997.

The spelling of 28198365 in words is "twenty-eight million, one hundred ninety-eight thousand, three hundred sixty-five".