19228736 has 28 divisors (see below), whose sum is σ = 39819072. Its totient is φ = 9195648.

The previous prime is 19228723. The next prime is 19228739. The reversal of 19228736 is 63782291.

It is a self number, because there is not a number n which added to its sum of digits gives 19228736.

It is not an unprimeable number, because it can be changed into a prime (19228739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5060 + ... + 8003.

Almost surely, 2^19228736 is an apocalyptic number.

19228736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

19228736 is an abundant number, since it is smaller than the sum of its proper divisors (20590336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19228736 is a wasteful number, since it uses less digits than its factorization.

19228736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13098 (or 13088 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 19228736 is about 4385.0582664316. The cubic root of 19228736 is about 267.9067025064.

The spelling of 19228736 in words is "nineteen million, two hundred twenty-eight thousand, seven hundred thirty-six".