197994540 has 48 divisors (see below), whose sum is σ = 561415680. Its totient is φ = 52128960.

The previous prime is 197994493. The next prime is 197994607. The reversal of 197994540 is 45499791.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 197994540.

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 15 ways as a sum of consecutive naturals, for example, 16146 + ... + 25625.

It is an arithmetic number, because the mean of its divisors is an integer number (11696160).

Almost surely, 2^197994540 is an apocalyptic number.

197994540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197994540 is an abundant number, since it is smaller than the sum of its proper divisors (363421140).

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

197994540 is a wasteful number, since it uses less digits than its factorization.

197994540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41862 (or 41860 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 197994540 is about 14071.0532654809. The cubic root of 197994540 is about 582.8423107872.

The spelling of 197994540 in words is "one hundred ninety-seven million, nine hundred ninety-four thousand, five hundred forty".