194439385 has 16 divisors (see below), whose sum is σ = 267054336. Its totient is φ = 133132608.

The previous prime is 194439379. The next prime is 194439389. The reversal of 194439385 is 583934491.

It is a happy number.

It is not a de Polignac number, because 194439385 - 2⁷ = 194439257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194439389) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22267 + ... + 29743.

It is an arithmetic number, because the mean of its divisors is an integer number (16690896).

Almost surely, 2^194439385 is an apocalyptic number.

It is an amenable number.

194439385 is a deficient number, since it is larger than the sum of its proper divisors (72614951).

194439385 is an equidigital number, since it uses as much as digits as its factorization.

194439385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8232.

The product of its digits is 466560, while the sum is 46.

The square root of 194439385 is about 13944.1523586054. The cubic root of 194439385 is about 579.3327493145.

The spelling of 194439385 in words is "one hundred ninety-four million, four hundred thirty-nine thousand, three hundred eighty-five".