19788222 has 24 divisors (see below), whose sum is σ = 40463496. Its totient is φ = 6451408.

The previous prime is 19788193. The next prime is 19788227. The reversal of 19788222 is 22288791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19788227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12508 + ... + 14000.

It is an arithmetic number, because the mean of its divisors is an integer number (1685979).

Almost surely, 2^19788222 is an apocalyptic number.

19788222 is an abundant number, since it is smaller than the sum of its proper divisors (20675274).

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

19788222 is a wasteful number, since it uses less digits than its factorization.

19788222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1592 (or 1545 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 19788222 is about 4448.3954410551. The cubic root of 19788222 is about 270.4802700283.

The spelling of 19788222 in words is "nineteen million, seven hundred eighty-eight thousand, two hundred twenty-two".