194219968 has 56 divisors (see below), whose sum is σ = 411370272. Its totient is φ = 90660864.

The previous prime is 194219947. The next prime is 194220001. The reversal of 194219968 is 869912491.

194219968 = 1122² + 1123² + ... + 1258².

It is a happy number.

194219968 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148405 + ... + 149707.

Almost surely, 2^194219968 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 194219968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205685136).

194219968 is an abundant number, since it is smaller than the sum of its proper divisors (217150304).

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

194219968 is a wasteful number, since it uses less digits than its factorization.

194219968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1469 (or 1459 counting only the distinct ones).

The product of its digits is 279936, while the sum is 49.

The square root of 194219968 is about 13936.2824311220. The cubic root of 194219968 is about 579.1147494158.

The spelling of 194219968 in words is "one hundred ninety-four million, two hundred nineteen thousand, nine hundred sixty-eight".