19138272 has 24 divisors (see below), whose sum is σ = 50238216. Its totient is φ = 6379392.

The previous prime is 19138271. The next prime is 19138297. The reversal of 19138272 is 27283191.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19138271) 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, 99583 + ... + 99774.

It is an arithmetic number, because the mean of its divisors is an integer number (2093259).

Almost surely, 2^19138272 is an apocalyptic number.

19138272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19138272 is an abundant number, since it is smaller than the sum of its proper divisors (31099944).

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

19138272 is a wasteful number, since it uses less digits than its factorization.

19138272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199370 (or 199362 counting only the distinct ones).

The product of its digits is 6048, while the sum is 33.

The square root of 19138272 is about 4374.7310774492. The cubic root of 19138272 is about 267.4859083618.

The spelling of 19138272 in words is "nineteen million, one hundred thirty-eight thousand, two hundred seventy-two".