19744272 has 60 divisors (see below), whose sum is σ = 57051904. Its totient is φ = 6367680.

The previous prime is 19744271. The next prime is 19744279. The reversal of 19744272 is 27244791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19744271) 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, 2253 + ... + 6675.

Almost surely, 2^19744272 is an apocalyptic number.

19744272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19744272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28525952).

19744272 is an abundant number, since it is smaller than the sum of its proper divisors (37307632).

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

19744272 is a wasteful number, since it uses less digits than its factorization.

19744272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4468 (or 4459 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 19744272 is about 4443.4527115746. The cubic root of 19744272 is about 270.2798743989.

The spelling of 19744272 in words is "nineteen million, seven hundred forty-four thousand, two hundred seventy-two".