194128064 has 28 divisors (see below), whose sum is σ = 414857184. Its totient is φ = 89597184.

The previous prime is 194128061. The next prime is 194128069. The reversal of 194128064 is 460821491.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (194128061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115832 + ... + 117495.

It is an arithmetic number, because the mean of its divisors is an integer number (14816328).

Almost surely, 2^194128064 is an apocalyptic number.

It is an amenable number.

194128064 is an abundant number, since it is smaller than the sum of its proper divisors (220729120).

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

194128064 is a wasteful number, since it uses less digits than its factorization.

194128064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233352 (or 233342 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 194128064 is about 13932.9847484306. The cubic root of 194128064 is about 579.0233901876.

The spelling of 194128064 in words is "one hundred ninety-four million, one hundred twenty-eight thousand, sixty-four".