194140128 has 192 divisors, whose sum is σ = 638088192. Its totient is φ = 50319360.

The previous prime is 194140109. The next prime is 194140139. The reversal of 194140128 is 821041491.

194140128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 194140095 and 194140104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 620100 + ... + 620412.

It is an arithmetic number, because the mean of its divisors is an integer number (3323376).

Almost surely, 2^194140128 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 194140128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319044096).

194140128 is an abundant number, since it is smaller than the sum of its proper divisors (443948064).

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

194140128 is a wasteful number, since it uses less digits than its factorization.

194140128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 409 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 194140128 is about 13933.4176711961. The cubic root of 194140128 is about 579.0353843207.

The spelling of 194140128 in words is "one hundred ninety-four million, one hundred forty thousand, one hundred twenty-eight".