194156988 has 12 divisors (see below), whose sum is σ = 453033000. Its totient is φ = 64718992.

The previous prime is 194156981. The next prime is 194156993. The reversal of 194156988 is 889651491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 194156988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194156981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8089863 + ... + 8089886.

It is an arithmetic number, because the mean of its divisors is an integer number (37752750).

Almost surely, 2^194156988 is an apocalyptic number.

It is an amenable number.

194156988 is an abundant number, since it is smaller than the sum of its proper divisors (258876012).

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

194156988 is a wasteful number, since it uses less digits than its factorization.

194156988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16179756 (or 16179754 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The square root of 194156988 is about 13934.0226783223. The cubic root of 194156988 is about 579.0521458460.

The spelling of 194156988 in words is "one hundred ninety-four million, one hundred fifty-six thousand, nine hundred eighty-eight".