197865520 has 40 divisors (see below), whose sum is σ = 464278320. Its totient is φ = 78416640.

The previous prime is 197865497. The next prime is 197865541. The reversal of 197865520 is 25568791.

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

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2626 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (11606958).

Almost surely, 2^197865520 is an apocalyptic number.

197865520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197865520 is an abundant number, since it is smaller than the sum of its proper divisors (266412800).

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

197865520 is a wasteful number, since it uses less digits than its factorization.

197865520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22813 (or 22807 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 43.

The square root of 197865520 is about 14066.4679290858. The cubic root of 197865520 is about 582.7156832974.

The spelling of 197865520 in words is "one hundred ninety-seven million, eight hundred sixty-five thousand, five hundred twenty".