19228089 has 4 divisors (see below), whose sum is σ = 25637456. Its totient is φ = 12818724.

The previous prime is 19228067. The next prime is 19228093. The reversal of 19228089 is 98082291.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 19228089 - 2⁷ = 19227961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19228039) 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, 3204679 + ... + 3204684.

It is an arithmetic number, because the mean of its divisors is an integer number (6409364).

Almost surely, 2^19228089 is an apocalyptic number.

It is an amenable number.

19228089 is a deficient number, since it is larger than the sum of its proper divisors (6409367).

19228089 is an equidigital number, since it uses as much as digits as its factorization.

19228089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409366.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 19228089 is about 4384.9844925609. The cubic root of 19228089 is about 267.9036976706.

It can be divided in two parts, 1922 and 8089, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 19228089 in words is "nineteen million, two hundred twenty-eight thousand, eighty-nine".