197390880 has 72 divisors (see below), whose sum is σ = 673601292. Its totient is φ = 52637184.

The previous prime is 197390873. The next prime is 197390891. The reversal of 197390880 is 88093791.

It can be written as a sum of positive squares in 2 ways, for example, as 165173904 + 32216976 = 12852^2 + 5676^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (45).

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 11 ways as a sum of consecutive naturals, for example, 67099 + ... + 69978.

Almost surely, 2^197390880 is an apocalyptic number.

197390880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197390880 is an abundant number, since it is smaller than the sum of its proper divisors (476210412).

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

197390880 is a wasteful number, since it uses less digits than its factorization.

197390880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137098 (or 137087 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 197390880 is about 14049.5864707827. The cubic root of 197390880 is about 582.2493705871.

The spelling of 197390880 in words is "one hundred ninety-seven million, three hundred ninety thousand, eight hundred eighty".