197805538 has 16 divisors (see below), whose sum is σ = 339367680. Its totient is φ = 84705696.

The previous prime is 197805527. The next prime is 197805539. The reversal of 197805538 is 835508791.

197805538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (197805539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14958 + ... + 24886.

It is an arithmetic number, because the mean of its divisors is an integer number (21210480).

Almost surely, 2^197805538 is an apocalyptic number.

197805538 is a deficient number, since it is larger than the sum of its proper divisors (141562142).

197805538 is a wasteful number, since it uses less digits than its factorization.

197805538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11361.

The product of its (nonzero) digits is 302400, while the sum is 46.

The square root of 197805538 is about 14064.3356757438. The cubic root of 197805538 is about 582.6567948419.

The spelling of 197805538 in words is "one hundred ninety-seven million, eight hundred five thousand, five hundred thirty-eight".