194009128 has 8 divisors (see below), whose sum is σ = 363767130. Its totient is φ = 97004560.

The previous prime is 194009113. The next prime is 194009141. The reversal of 194009128 is 821900491.

It can be written as a sum of positive squares in only one way, i.e., 151733124 + 42276004 = 12318^2 + 6502^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 194009093 and 194009102.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12125563 + ... + 12125578.

Almost surely, 2^194009128 is an apocalyptic number.

It is an amenable number.

194009128 is a deficient number, since it is larger than the sum of its proper divisors (169758002).

194009128 is a wasteful number, since it uses less digits than its factorization.

194009128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24251147 (or 24251143 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 194009128 is about 13928.7159494334. The cubic root of 194009128 is about 578.9051163818.

The spelling of 194009128 in words is "one hundred ninety-four million, nine thousand, one hundred twenty-eight".