19228445 has 8 divisors (see below), whose sum is σ = 24431544. Its totient is φ = 14477824.

The previous prime is 19228441. The next prime is 19228459. The reversal of 19228445 is 54482291.

It can be written as a sum of positive squares in 4 ways, for example, as 1747684 + 17480761 = 1322^2 + 4181^2 .

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 19228445 - 2² = 19228441 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 (19228441) 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, 113024 + ... + 113193.

It is an arithmetic number, because the mean of its divisors is an integer number (3053943).

Almost surely, 2^19228445 is an apocalyptic number.

It is an amenable number.

19228445 is a deficient number, since it is larger than the sum of its proper divisors (5203099).

19228445 is a wasteful number, since it uses less digits than its factorization.

19228445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226239.

The product of its digits is 23040, while the sum is 35.

The square root of 19228445 is about 4385.0250854471. The cubic root of 19228445 is about 267.9053510353.

The spelling of 19228445 in words is "nineteen million, two hundred twenty-eight thousand, four hundred forty-five".