194492478 has 32 divisors (see below), whose sum is σ = 412577280. Its totient is φ = 60912000.

The previous prime is 194492477. The next prime is 194492537. The reversal of 194492478 is 874294491.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194492477) 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 15 ways as a sum of consecutive naturals, for example, 75333 + ... + 77871.

It is an arithmetic number, because the mean of its divisors is an integer number (12893040).

Almost surely, 2^194492478 is an apocalyptic number.

194492478 is an abundant number, since it is smaller than the sum of its proper divisors (218084802).

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

194492478 is a wasteful number, since it uses less digits than its factorization.

194492478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3312.

The product of its digits is 580608, while the sum is 48.

The square root of 194492478 is about 13946.0560016085. The cubic root of 194492478 is about 579.3854747684.

The spelling of 194492478 in words is "one hundred ninety-four million, four hundred ninety-two thousand, four hundred seventy-eight".