194979128 has 8 divisors (see below), whose sum is σ = 365585880. Its totient is φ = 97489560.

The previous prime is 194979089. The next prime is 194979143. The reversal of 194979128 is 821979491.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12186188 + ... + 12186203.

It is an arithmetic number, because the mean of its divisors is an integer number (45698235).

Almost surely, 2^194979128 is an apocalyptic number.

It is an amenable number.

194979128 is a deficient number, since it is larger than the sum of its proper divisors (170606752).

194979128 is a wasteful number, since it uses less digits than its factorization.

194979128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24372397 (or 24372393 counting only the distinct ones).

The product of its digits is 326592, while the sum is 50.

The square root of 194979128 is about 13963.4926862873. The cubic root of 194979128 is about 579.8683093802.

The spelling of 194979128 in words is "one hundred ninety-four million, nine hundred seventy-nine thousand, one hundred twenty-eight".