194423328 has 144 divisors (see below), whose sum is σ = 625768416. Its totient is φ = 58890240.

The previous prime is 194423323. The next prime is 194423357. The reversal of 194423328 is 823324491.

It is a tau number, because it is divible by the number of its divisors (144).

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 = 194423292 and 194423301.

It is not an unprimeable number, because it can be changed into a prime (194423321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84400 + ... + 86672.

It is an arithmetic number, because the mean of its divisors is an integer number (4345614).

Almost surely, 2^194423328 is an apocalyptic number.

194423328 is a gapful number since it is divisible by the number (18) 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 194423328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312884208).

194423328 is an abundant number, since it is smaller than the sum of its proper divisors (431345088).

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

194423328 is a wasteful number, since it uses less digits than its factorization.

194423328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2309 (or 2289 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 194423328 is about 13943.5765856541. The cubic root of 194423328 is about 579.3168015818.

The spelling of 194423328 in words is "one hundred ninety-four million, four hundred twenty-three thousand, three hundred twenty-eight".