197143040 has 80 divisors (see below), whose sum is σ = 481931208. Its totient is φ = 77316096.

The previous prime is 197143039. The next prime is 197143081. The reversal of 197143040 is 40341791.

It can be written as a sum of positive squares in 4 ways, for example, as 196897024 + 246016 = 14032^2 + 496^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 197142994 and 197143012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134954 + ... + 136406.

Almost surely, 2^197143040 is an apocalyptic number.

197143040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197143040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240965604).

197143040 is an abundant number, since it is smaller than the sum of its proper divisors (284788168).

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

197143040 is an equidigital number, since it uses as much as digits as its factorization.

197143040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1529 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 197143040 is about 14040.7635120032. The cubic root of 197143040 is about 582.0055816787.

The spelling of 197143040 in words is "one hundred ninety-seven million, one hundred forty-three thousand, forty".