194978912 has 96 divisors (see below), whose sum is σ = 429649920. Its totient is φ = 86676480.

The previous prime is 194978879. The next prime is 194978923. The reversal of 194978912 is 219879491.

It is a super-2 number, since 2×194978912² = 76033552249407488, which contains 22 as substring.

It is a congruent number.

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 in 15 ways as a sum of consecutive naturals, for example, 1020737 + ... + 1020927.

It is an arithmetic number, because the mean of its divisors is an integer number (4475520).

Almost surely, 2^194978912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194978912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214824960).

194978912 is an abundant number, since it is smaller than the sum of its proper divisors (234671008).

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

194978912 is a wasteful number, since it uses less digits than its factorization.

194978912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 308 counting only the distinct ones).

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

The square root of 194978912 is about 13963.4849518306. The cubic root of 194978912 is about 579.8680952520.

The spelling of 194978912 in words is "one hundred ninety-four million, nine hundred seventy-eight thousand, nine hundred twelve".