19397244 has 12 divisors (see below), whose sum is σ = 45260264. Its totient is φ = 6465744.

The previous prime is 19397243. The next prime is 19397251. The reversal of 19397244 is 44279391.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19397243) 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, 808207 + ... + 808230.

Almost surely, 2^19397244 is an apocalyptic number.

It is an amenable number.

19397244 is an abundant number, since it is smaller than the sum of its proper divisors (25863020).

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

19397244 is a wasteful number, since it uses less digits than its factorization.

19397244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616444 (or 1616442 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 19397244 is about 4404.2302392132. The cubic root of 19397244 is about 268.6870136149.

The spelling of 19397244 in words is "nineteen million, three hundred ninety-seven thousand, two hundred forty-four".