19228909 has 8 divisors (see below), whose sum is σ = 22137408. Its totient is φ = 16360800.

The previous prime is 19228907. The next prime is 19228949. The reversal of 19228909 is 90982291.

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

It is a cyclic number.

It is not a de Polignac number, because 19228909 - 2¹ = 19228907 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 (19228907) 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 7 ways as a sum of consecutive naturals, for example, 9067 + ... + 10984.

It is an arithmetic number, because the mean of its divisors is an integer number (2767176).

Almost surely, 2^19228909 is an apocalyptic number.

It is an amenable number.

19228909 is a deficient number, since it is larger than the sum of its proper divisors (2908499).

19228909 is a wasteful number, since it uses less digits than its factorization.

19228909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20195.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 19228909 is about 4385.0779924649. The cubic root of 19228909 is about 267.9075059518.

The spelling of 19228909 in words is "nineteen million, two hundred twenty-eight thousand, nine hundred nine".