194472138 has 32 divisors (see below), whose sum is σ = 445633920. Its totient is φ = 55422720.

The previous prime is 194472133. The next prime is 194472139. The reversal of 194472138 is 831274491.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 194472096 and 194472105.

It is not an unprimeable number, because it can be changed into a prime (194472133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11518 + ... + 22838.

It is an arithmetic number, because the mean of its divisors is an integer number (13926060).

Almost surely, 2^194472138 is an apocalyptic number.

194472138 is an abundant number, since it is smaller than the sum of its proper divisors (251161782).

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

194472138 is a wasteful number, since it uses less digits than its factorization.

194472138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11742.

The product of its digits is 48384, while the sum is 39.

The square root of 194472138 is about 13945.3267441104. The cubic root of 194472138 is about 579.3652767098.

The spelling of 194472138 in words is "one hundred ninety-four million, four hundred seventy-two thousand, one hundred thirty-eight".