194690172 has 24 divisors (see below), whose sum is σ = 454760656. Its totient is φ = 64827648.

The previous prime is 194690161. The next prime is 194690173. The reversal of 194690172 is 271096491.

It is a self number, because there is not a number n which added to its sum of digits gives 194690172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194690173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3828 + ... + 20100.

Almost surely, 2^194690172 is an apocalyptic number.

194690172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

194690172 is an abundant number, since it is smaller than the sum of its proper divisors (260070484).

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

194690172 is a wasteful number, since it uses less digits than its factorization.

194690172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17277 (or 17275 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 194690172 is about 13953.1420117477. The cubic root of 194690172 is about 579.5817158541.

The spelling of 194690172 in words is "one hundred ninety-four million, six hundred ninety thousand, one hundred seventy-two".