197940618 has 32 divisors (see below), whose sum is σ = 440334720. Its totient is φ = 65910240.

The previous prime is 197940601. The next prime is 197940619. The reversal of 197940618 is 816049791.

It is a happy number.

197940618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (197940619) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85638 + ... + 87918.

It is an arithmetic number, because the mean of its divisors is an integer number (13760460).

Almost surely, 2^197940618 is an apocalyptic number.

197940618 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

197940618 is an abundant number, since it is smaller than the sum of its proper divisors (242394102).

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

197940618 is a wasteful number, since it uses less digits than its factorization.

197940618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3899 (or 3893 counting only the distinct ones).

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

The square root of 197940618 is about 14069.1370737512. The cubic root of 197940618 is about 582.7893953944.

The spelling of 197940618 in words is "one hundred ninety-seven million, nine hundred forty thousand, six hundred eighteen".