197949520 has 40 divisors (see below), whose sum is σ = 464720256. Its totient is φ = 78407808.

The previous prime is 197949503. The next prime is 197949527. The reversal of 197949520 is 25949791.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197949527) 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, 3772 + ... + 20251.

Almost surely, 2^197949520 is an apocalyptic number.

197949520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197949520 is an abundant number, since it is smaller than the sum of its proper divisors (266770736).

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

197949520 is a wasteful number, since it uses less digits than its factorization.

197949520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24139 (or 24133 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 197949520 is about 14069.4534364346. The cubic root of 197949520 is about 582.7981318756.

The spelling of 197949520 in words is "one hundred ninety-seven million, nine hundred forty-nine thousand, five hundred twenty".