194694640 has 60 divisors (see below), whose sum is σ = 526580136. Its totient is φ = 66751104.

The previous prime is 194694637. The next prime is 194694649. The reversal of 194694640 is 46496491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194694649) 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, 20914 + ... + 28753.

Almost surely, 2^194694640 is an apocalyptic number.

194694640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194694640 is an abundant number, since it is smaller than the sum of its proper divisors (331885496).

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

194694640 is a wasteful number, since it uses less digits than its factorization.

194694640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49694 (or 49681 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 194694640 is about 13953.3021181368. The cubic root of 194694640 is about 579.5861494819.

The spelling of 194694640 in words is "one hundred ninety-four million, six hundred ninety-four thousand, six hundred forty".