194991384 has 64 divisors (see below), whose sum is σ = 568512000. Its totient is φ = 55709472.

The previous prime is 194991359. The next prime is 194991397. The reversal of 194991384 is 483199491.

194991384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×194991384³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3612 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (8883000).

Almost surely, 2^194991384 is an apocalyptic number.

194991384 is a gapful number since it is divisible by the number (14) 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 194991384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284256000).

194991384 is an abundant number, since it is smaller than the sum of its proper divisors (373520616).

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

194991384 is a wasteful number, since it uses less digits than its factorization.

194991384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23717 (or 23699 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 194991384 is about 13963.9315380734. The cubic root of 194991384 is about 579.8804589150.

The spelling of 194991384 in words is "one hundred ninety-four million, nine hundred ninety-one thousand, three hundred eighty-four".