194189994 has 64 divisors (see below), whose sum is σ = 464025600. Its totient is φ = 60003504.

The previous prime is 194189993. The next prime is 194190011. The reversal of 194189994 is 499981491.

194189994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 194189994.

It is not an unprimeable number, because it can be changed into a prime (194189993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46209 + ... + 50235.

It is an arithmetic number, because the mean of its divisors is an integer number (7250400).

Almost surely, 2^194189994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194189994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232012800).

194189994 is an abundant number, since it is smaller than the sum of its proper divisors (269835606).

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

194189994 is a wasteful number, since it uses less digits than its factorization.

194189994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4104 (or 4098 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 194189994 is about 13935.2069952333. The cubic root of 194189994 is about 579.0849562578.

The spelling of 194189994 in words is "one hundred ninety-four million, one hundred eighty-nine thousand, nine hundred ninety-four".