194216238 has 32 divisors (see below), whose sum is σ = 432047520. Its totient is φ = 64670400.

The previous prime is 194216237. The next prime is 194216257. The reversal of 194216238 is 832612491.

194216238 is a `hidden beast` number, since 1 + 9 + 4 + 21 + 623 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194216237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96256 + ... + 98252.

It is an arithmetic number, because the mean of its divisors is an integer number (13501485).

Almost surely, 2^194216238 is an apocalyptic number.

194216238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

194216238 is an abundant number, since it is smaller than the sum of its proper divisors (237831282).

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

194216238 is a wasteful number, since it uses less digits than its factorization.

194216238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3809 (or 3803 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 194216238 is about 13936.1486071296. The cubic root of 194216238 is about 579.1110420870. Note that the first 3 decimals are identical.

The spelling of 194216238 in words is "one hundred ninety-four million, two hundred sixteen thousand, two hundred thirty-eight".