397888191174720 has 896 divisors, whose sum is σ = 1395672462213120. Its totient is φ = 95601705615360.

The previous prime is 397888191174599. The next prime is 397888191174739. The reversal of 397888191174720 is 27471191888793.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 19901365044 + ... + 19901385036.

It is an arithmetic number, because the mean of its divisors is an integer number (1557670158720).

Almost surely, 2^{397888191174720} is an apocalyptic number.

397888191174720 is a gapful number since it is divisible by the number (30) 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 397888191174720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (697836231106560).

397888191174720 is an abundant number, since it is smaller than the sum of its proper divisors (997784271038400).

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

397888191174720 is a wasteful number, since it uses less digits than its factorization.

397888191174720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20483 (or 20473 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 75.

The spelling of 397888191174720 in words is "three hundred ninety-seven trillion, eight hundred eighty-eight billion, one hundred ninety-one million, one hundred seventy-four thousand, seven hundred twenty".