197071920 has 80 divisors (see below), whose sum is σ = 678810720. Its totient is φ = 52551936.

The previous prime is 197071909. The next prime is 197071943. The reversal of 197071920 is 29170791.

197071920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43459 + ... + 47778.

It is an arithmetic number, because the mean of its divisors is an integer number (8485134).

Almost surely, 2^197071920 is an apocalyptic number.

197071920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197071920 is an abundant number, since it is smaller than the sum of its proper divisors (481738800).

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

197071920 is a wasteful number, since it uses less digits than its factorization.

197071920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91259 (or 91247 counting only the distinct ones).

The product of its (nonzero) digits is 7938, while the sum is 36.

The square root of 197071920 is about 14038.2306577432. The cubic root of 197071920 is about 581.9355864518.

The spelling of 197071920 in words is "one hundred ninety-seven million, seventy-one thousand, nine hundred twenty".