19394244 has 72 divisors (see below), whose sum is σ = 52153920. Its totient is φ = 6063552.

The previous prime is 19394233. The next prime is 19394281. The reversal of 19394244 is 44249391.

It is a super-2 number, since 2×19394244² = 752273400663072, which contains 22 as substring.

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 junction number, because it is equal to n+sod(n) for n = 19394199 and 19394208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48654 + ... + 49050.

It is an arithmetic number, because the mean of its divisors is an integer number (724360).

Almost surely, 2^19394244 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19394244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26076960).

19394244 is an abundant number, since it is smaller than the sum of its proper divisors (32759676).

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

19394244 is a wasteful number, since it uses less digits than its factorization.

19394244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 489 (or 484 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 19394244 is about 4403.8896443939. The cubic root of 19394244 is about 268.6731610868.

The spelling of 19394244 in words is "nineteen million, three hundred ninety-four thousand, two hundred forty-four".