28196959 has 4 divisors (see below), whose sum is σ = 32225104. Its totient is φ = 24168816.

The previous prime is 28196953. The next prime is 28196963. The reversal of 28196959 is 95969182.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28196959 - 2²¹ = 26099807 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 (28196953) 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 3 ways as a sum of consecutive naturals, for example, 2014062 + ... + 2014075.

It is an arithmetic number, because the mean of its divisors is an integer number (8056276).

Almost surely, 2^28196959 is an apocalyptic number.

28196959 is a deficient number, since it is larger than the sum of its proper divisors (4028145).

28196959 is an equidigital number, since it uses as much as digits as its factorization.

28196959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028144.

The product of its digits is 349920, while the sum is 49.

The square root of 28196959 is about 5310.0808845064. The cubic root of 28196959 is about 304.3692384086.

The spelling of 28196959 in words is "twenty-eight million, one hundred ninety-six thousand, nine hundred fifty-nine".