194389812 has 36 divisors (see below), whose sum is σ = 492047556. Its totient is φ = 64707840.

The previous prime is 194389777. The next prime is 194389829. The reversal of 194389812 is 218983491.

194389812 is a `hidden beast` number, since 194 + 389 + 81 + 2 = 666.

194389812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 139570596 + 54819216 = 11814^2 + 7404^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26268 + ... + 32844.

Almost surely, 2^194389812 is an apocalyptic number.

194389812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

194389812 is an abundant number, since it is smaller than the sum of its proper divisors (297657744).

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

194389812 is a wasteful number, since it uses less digits than its factorization.

194389812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7408 (or 7403 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 194389812 is about 13942.3746901308. The cubic root of 194389812 is about 579.2835108275.

The spelling of 194389812 in words is "one hundred ninety-four million, three hundred eighty-nine thousand, eight hundred twelve".