197287838943840 has 336 divisors, whose sum is σ = 698867948325456. Its totient is φ = 52606412928000.

The previous prime is 197287838943773. The next prime is 197287838943857. The reversal of 197287838943840 is 48349838782791.

197287838943840 is a `hidden beast` number, since 1 + 9 + 7 + 2 + 87 + 83 + 89 + 4 + 384 + 0 = 666.

197287838943840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a self number, because there is not a number n which added to its sum of digits gives 197287838943840.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1942121850 + ... + 1942223430.

It is an arithmetic number, because the mean of its divisors is an integer number (2079964131921).

Almost surely, 2^{197287838943840} is an apocalyptic number.

197287838943840 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 197287838943840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349433974162728).

197287838943840 is an abundant number, since it is smaller than the sum of its proper divisors (501580109381616).

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

197287838943840 is a wasteful number, since it uses less digits than its factorization.

197287838943840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118265 (or 118242 counting only the distinct ones).

The product of its (nonzero) digits is 4682022912, while the sum is 81.

The spelling of 197287838943840 in words is "one hundred ninety-seven trillion, two hundred eighty-seven billion, eight hundred thirty-eight million, nine hundred forty-three thousand, eight hundred forty".