19228742 has 16 divisors (see below), whose sum is σ = 32065152. Its totient is φ = 8588160.

The previous prime is 19228739. The next prime is 19228747. The reversal of 19228742 is 24782291.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19228747) 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, 11123 + ... + 12734.

It is an arithmetic number, because the mean of its divisors is an integer number (2004072).

Almost surely, 2^19228742 is an apocalyptic number.

19228742 is a deficient number, since it is larger than the sum of its proper divisors (12836410).

19228742 is a wasteful number, since it uses less digits than its factorization.

19228742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23903.

The product of its digits is 16128, while the sum is 35.

The square root of 19228742 is about 4385.0589505730. The cubic root of 19228742 is about 267.9067303716.

The spelling of 19228742 in words is "nineteen million, two hundred twenty-eight thousand, seven hundred forty-two".