197494440 has 256 divisors, whose sum is σ = 738097920. Its totient is φ = 41533440.

The previous prime is 197494403. The next prime is 197494441. The reversal of 197494440 is 44494791.

It is a junction number, because it is equal to n+sod(n) for n = 197494392 and 197494401.

It is not an unprimeable number, because it can be changed into a prime (197494441) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 291382 + ... + 292058.

It is an arithmetic number, because the mean of its divisors is an integer number (2883195).

Almost surely, 2^197494440 is an apocalyptic number.

197494440 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 197494440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (369048960).

197494440 is an abundant number, since it is smaller than the sum of its proper divisors (540603480).

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

197494440 is a wasteful number, since it uses less digits than its factorization.

197494440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 728 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 197494440 is about 14053.2715052403. The cubic root of 197494440 is about 582.3511773895.

The spelling of 197494440 in words is "one hundred ninety-seven million, four hundred ninety-four thousand, four hundred forty".