19438434 has 32 divisors (see below), whose sum is σ = 43727040. Its totient is φ = 6399936.

The previous prime is 19438423. The next prime is 19438477. The reversal of 19438434 is 43483491.

19438434 is a `hidden beast` number, since 194 + 38 + 434 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2314 + ... + 6650.

It is an arithmetic number, because the mean of its divisors is an integer number (1366470).

Almost surely, 2^19438434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19438434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21863520).

19438434 is an abundant number, since it is smaller than the sum of its proper divisors (24288606).

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

19438434 is a wasteful number, since it uses less digits than its factorization.

19438434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4431 (or 4425 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 19438434 is about 4408.9039454268. The cubic root of 19438434 is about 268.8770645586.

The spelling of 19438434 in words is "nineteen million, four hundred thirty-eight thousand, four hundred thirty-four".