19434340 has 48 divisors (see below), whose sum is σ = 43344000. Its totient is φ = 7299072.

The previous prime is 19434329. The next prime is 19434347. The reversal of 19434340 is 4343491.

It is a junction number, because it is equal to n+sod(n) for n = 19434299 and 19434308.

It is not an unprimeable number, because it can be changed into a prime (19434347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75492 + ... + 75748.

It is an arithmetic number, because the mean of its divisors is an integer number (903000).

Almost surely, 2^19434340 is an apocalyptic number.

19434340 is a gapful number since it is divisible by the number (10) 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 19434340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21672000).

19434340 is an abundant number, since it is smaller than the sum of its proper divisors (23909660).

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

19434340 is a wasteful number, since it uses less digits than its factorization.

19434340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 482 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 19434340 is about 4408.4396332489. The cubic root of 19434340 is about 268.8581868377.

The spelling of 19434340 in words is "nineteen million, four hundred thirty-four thousand, three hundred forty".