194814640 has 20 divisors (see below), whose sum is σ = 452944224. Its totient is φ = 77925824.

The previous prime is 194814629. The next prime is 194814647. The reversal of 194814640 is 46418491.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 194814640.

It is not an unprimeable number, because it can be changed into a prime (194814647) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1217512 + ... + 1217671.

Almost surely, 2^194814640 is an apocalyptic number.

194814640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194814640 is an abundant number, since it is smaller than the sum of its proper divisors (258129584).

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

194814640 is a wasteful number, since it uses less digits than its factorization.

194814640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2435196 (or 2435190 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 194814640 is about 13957.6015131540. The cubic root of 194814640 is about 579.7052009595.

The spelling of 194814640 in words is "one hundred ninety-four million, eight hundred fourteen thousand, six hundred forty".