28198395 has 16 divisors (see below), whose sum is σ = 50130720. Its totient is φ = 15039072.

The previous prime is 28198381. The next prime is 28198421. The reversal of 28198395 is 59389182.

It is a happy number.

It is not a de Polignac number, because 28198395 - 2⁸ = 28198139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28198395.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104304 + ... + 104573.

It is an arithmetic number, because the mean of its divisors is an integer number (3133170).

Almost surely, 2^28198395 is an apocalyptic number.

28198395 is a deficient number, since it is larger than the sum of its proper divisors (21932325).

28198395 is a wasteful number, since it uses less digits than its factorization.

28198395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208891 (or 208885 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 28198395 is about 5310.2160972977. The cubic root of 28198395 is about 304.3744052401.

The spelling of 28198395 in words is "twenty-eight million, one hundred ninety-eight thousand, three hundred ninety-five".