19244340 has 144 divisors (see below), whose sum is σ = 65257920. Its totient is φ = 4561920.

The previous prime is 19244317. The next prime is 19244377. The reversal of 19244340 is 4344291.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 57975 + ... + 58305.

It is an arithmetic number, because the mean of its divisors is an integer number (453180).

Almost surely, 2^19244340 is an apocalyptic number.

19244340 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 19244340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32628960).

19244340 is an abundant number, since it is smaller than the sum of its proper divisors (46013580).

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

19244340 is a wasteful number, since it uses less digits than its factorization.

19244340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 19244340 is about 4386.8371294134. The cubic root of 19244340 is about 267.9791511219.

The spelling of 19244340 in words is "nineteen million, two hundred forty-four thousand, three hundred forty".