197942740 has 24 divisors (see below), whose sum is σ = 416069640. Its totient is φ = 79102848.

The previous prime is 197942737. The next prime is 197942749. The reversal of 197942740 is 47249791.

It can be written as a sum of positive squares in 4 ways, for example, as 102333456 + 95609284 = 10116^2 + 9778^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197942749) 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, 20554 + ... + 28606.

It is an arithmetic number, because the mean of its divisors is an integer number (17336235).

Almost surely, 2^197942740 is an apocalyptic number.

197942740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197942740 is an abundant number, since it is smaller than the sum of its proper divisors (218126900).

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

197942740 is a wasteful number, since it uses less digits than its factorization.

197942740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291 (or 9289 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 197942740 is about 14069.2124868452. The cubic root of 197942740 is about 582.7914779629.

The spelling of 197942740 in words is "one hundred ninety-seven million, nine hundred forty-two thousand, seven hundred forty".