194545644 has 12 divisors (see below), whose sum is σ = 453939864. Its totient is φ = 64848544.

The previous prime is 194545633. The next prime is 194545649. The reversal of 194545644 is 446545491.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 194545596 and 194545605.

It is not an unprimeable number, because it can be changed into a prime (194545649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8106057 + ... + 8106080.

It is an arithmetic number, because the mean of its divisors is an integer number (37828322).

Almost surely, 2^194545644 is an apocalyptic number.

It is an amenable number.

194545644 is an abundant number, since it is smaller than the sum of its proper divisors (259394220).

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

194545644 is a wasteful number, since it uses less digits than its factorization.

194545644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16212144 (or 16212142 counting only the distinct ones).

The product of its digits is 345600, while the sum is 42.

The square root of 194545644 is about 13947.9620016689. The cubic root of 194545644 is about 579.4382631026.

The spelling of 194545644 in words is "one hundred ninety-four million, five hundred forty-five thousand, six hundred forty-four".