197395920 has 80 divisors (see below), whose sum is σ = 679926720. Its totient is φ = 52638336.

The previous prime is 197395901. The next prime is 197395937. The reversal of 197395920 is 29593791.

It is a happy number.

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 (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43534 + ... + 47853.

It is an arithmetic number, because the mean of its divisors is an integer number (8499084).

Almost surely, 2^197395920 is an apocalyptic number.

197395920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197395920 is an abundant number, since it is smaller than the sum of its proper divisors (482530800).

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

197395920 is a wasteful number, since it uses less digits than its factorization.

197395920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91409 (or 91397 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 197395920 is about 14049.7658343476. The cubic root of 197395920 is about 582.2543260877.

The spelling of 197395920 in words is "one hundred ninety-seven million, three hundred ninety-five thousand, nine hundred twenty".