28343019 has 8 divisors (see below), whose sum is σ = 37850512. Its totient is φ = 18865440.

The previous prime is 28343011. The next prime is 28343023. The reversal of 28343019 is 91034382.

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

It is not a de Polignac number, because 28343019 - 2³ = 28343011 is a prime.

It is a super-2 number, since 2×28343019² = 1606653452068722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28343011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5164 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (4731314).

Almost surely, 2^28343019 is an apocalyptic number.

28343019 is a deficient number, since it is larger than the sum of its proper divisors (9507493).

28343019 is a wasteful number, since it uses less digits than its factorization.

28343019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14957.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28343019 is about 5323.8162064444. The cubic root of 28343019 is about 304.8938769018.

The spelling of 28343019 in words is "twenty-eight million, three hundred forty-three thousand, nineteen".