194216872 has 8 divisors (see below), whose sum is σ = 364156650. Its totient is φ = 97108432.

The previous prime is 194216833. The next prime is 194216921. The reversal of 194216872 is 278612491.

It can be written as a sum of positive squares in only one way, i.e., 194156356 + 60516 = 13934^2 + 246^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12138547 + ... + 12138562.

Almost surely, 2^194216872 is an apocalyptic number.

It is an amenable number.

194216872 is a deficient number, since it is larger than the sum of its proper divisors (169939778).

194216872 is a wasteful number, since it uses less digits than its factorization.

194216872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24277115 (or 24277111 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 194216872 is about 13936.1713537112. The cubic root of 194216872 is about 579.1116722368. Note that the first 3 decimals are identical.

The spelling of 194216872 in words is "one hundred ninety-four million, two hundred sixteen thousand, eight hundred seventy-two".