197761920 has 64 divisors (see below), whose sum is σ = 630372240. Its totient is φ = 52736000.

The previous prime is 197761919. The next prime is 197761999. The reversal of 197761920 is 29167791.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 49581 + ... + 53420.

Almost surely, 2^197761920 is an apocalyptic number.

197761920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197761920 is an abundant number, since it is smaller than the sum of its proper divisors (432610320).

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

197761920 is a wasteful number, since it uses less digits than its factorization.

197761920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103023 (or 103011 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 42.

The square root of 197761920 is about 14062.7849304467. The cubic root of 197761920 is about 582.6139645744.

The spelling of 197761920 in words is "one hundred ninety-seven million, seven hundred sixty-one thousand, nine hundred twenty".