19448136 has 48 divisors (see below), whose sum is σ = 55773900. Its totient is φ = 6100992.

The previous prime is 19448123. The next prime is 19448137. The reversal of 19448136 is 63184491.

It can be written as a sum of positive squares in 2 ways, for example, as 19448100 + 36 = 4410^2 + 6^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 19448136.

It is not an unprimeable number, because it can be changed into a prime (19448137) 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, 6721 + ... + 9168.

Almost surely, 2^19448136 is an apocalyptic number.

It is an amenable number.

19448136 is an abundant number, since it is smaller than the sum of its proper divisors (36325764).

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

19448136 is a wasteful number, since it uses less digits than its factorization.

19448136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15918 (or 15911 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 19448136 is about 4410.0040816308. The cubic root of 19448136 is about 268.9217905791.

Subtracting from 19448136 its sum of digits (36), we obtain a square (19448100 = 4410²).

It can be divided in two parts, 194481 and 36, that multiplied together give a square (7001316 = 2646²).

The spelling of 19448136 in words is "nineteen million, four hundred forty-eight thousand, one hundred thirty-six".