28956319 has 4 divisors (see below), whose sum is σ = 33092944. Its totient is φ = 24819696.

The previous prime is 28956313. The next prime is 28956331. The reversal of 28956319 is 91365982.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28956319 is a prime.

It is a super-2 number, since 2×28956319² = 1676936820059522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28956313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068302 + ... + 2068315.

It is an arithmetic number, because the mean of its divisors is an integer number (8273236).

Almost surely, 2^28956319 is an apocalyptic number.

28956319 is a deficient number, since it is larger than the sum of its proper divisors (4136625).

28956319 is an equidigital number, since it uses as much as digits as its factorization.

28956319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136624.

The product of its digits is 116640, while the sum is 43.

The square root of 28956319 is about 5381.1075997419. The cubic root of 28956319 is about 307.0773500308.

The spelling of 28956319 in words is "twenty-eight million, nine hundred fifty-six thousand, three hundred nineteen".