194945920 has 64 divisors (see below), whose sum is σ = 501913440. Its totient is φ = 71976960.

The previous prime is 194945911. The next prime is 194945923. The reversal of 194945920 is 29549491.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194945923) 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 7 ways as a sum of consecutive naturals, for example, 3396 + ... + 20035.

Almost surely, 2^194945920 is an apocalyptic number.

194945920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194945920 is an abundant number, since it is smaller than the sum of its proper divisors (306967520).

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

194945920 is a wasteful number, since it uses less digits than its factorization.

194945920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23463 (or 23451 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 194945920 is about 13962.3035348756. The cubic root of 194945920 is about 579.8353872920.

The spelling of 194945920 in words is "one hundred ninety-four million, nine hundred forty-five thousand, nine hundred twenty".