194328819 has 12 divisors (see below), whose sum is σ = 297209016. Its totient is φ = 121931712.

The previous prime is 194328809. The next prime is 194328829. The reversal of 194328819 is 918823491.

It is an interprime number because it is at equal distance from previous prime (194328809) and next prime (194328829).

It is not a de Polignac number, because 194328819 - 2¹¹ = 194326771 is a prime.

It is a super-2 number, since 2×194328819² = 75527379787869522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194328809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634909 + ... + 635214.

It is an arithmetic number, because the mean of its divisors is an integer number (24767418).

Almost surely, 2^194328819 is an apocalyptic number.

194328819 is a deficient number, since it is larger than the sum of its proper divisors (102880197).

194328819 is a wasteful number, since it uses less digits than its factorization.

194328819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270146 (or 1270143 counting only the distinct ones).

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

The square root of 194328819 is about 13940.1871938651. The cubic root of 194328819 is about 579.2229179140. Note that the first 3 decimals are identical.

The spelling of 194328819 in words is "one hundred ninety-four million, three hundred twenty-eight thousand, eight hundred nineteen".