197392644 has 36 divisors (see below), whose sum is σ = 528317244. Its totient is φ = 61926912.

The previous prime is 197392607. The next prime is 197392673. The reversal of 197392644 is 446293791.

It is a happy number.

197392644 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 126832644 + 70560000 = 11262^2 + 8400^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 197392644.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160657 + ... + 161880.

It is an arithmetic number, because the mean of its divisors is an integer number (14675479).

Almost surely, 2^197392644 is an apocalyptic number.

It is an amenable number.

197392644 is an abundant number, since it is smaller than the sum of its proper divisors (330924600).

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

197392644 is a wasteful number, since it uses less digits than its factorization.

197392644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322564 (or 322559 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 197392644 is about 14049.6492482909. The cubic root of 197392644 is about 582.2511050219.

The spelling of 197392644 in words is "one hundred ninety-seven million, three hundred ninety-two thousand, six hundred forty-four".