19222872 has 16 divisors (see below), whose sum is σ = 48057240. Its totient is φ = 6407616.

The previous prime is 19222867. The next prime is 19222873. The reversal of 19222872 is 27822291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19222873) 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, 400453 + ... + 400500.

Almost surely, 2^19222872 is an apocalyptic number.

19222872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19222872 is an abundant number, since it is smaller than the sum of its proper divisors (28834368).

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

19222872 is a wasteful number, since it uses less digits than its factorization.

19222872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800962 (or 800958 counting only the distinct ones).

The product of its digits is 8064, while the sum is 33.

The square root of 19222872 is about 4384.3895812302. The cubic root of 19222872 is about 267.8794661065.

The spelling of 19222872 in words is "nineteen million, two hundred twenty-two thousand, eight hundred seventy-two".