197789246928 has 640 divisors, whose sum is σ = 763791114240. Its totient is φ = 47507005440.

The previous prime is 197789246917. The next prime is 197789246929. The reversal of 197789246928 is 829642987791.

197789246928 is a `hidden beast` number, since 1 + 9 + 7 + 78 + 92 + 469 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197789246929) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20712651 + ... + 20722197.

It is an arithmetic number, because the mean of its divisors is an integer number (1193423616).

Almost surely, 2^197789246928 is an apocalyptic number.

197789246928 is a gapful number since it is divisible by the number (18) 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 197789246928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (381895557120).

197789246928 is an abundant number, since it is smaller than the sum of its proper divisors (566001867312).

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

197789246928 is a wasteful number, since it uses less digits than its factorization.

197789246928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632 (or 9620 counting only the distinct ones).

The product of its digits is 219469824, while the sum is 72.

The spelling of 197789246928 in words is "one hundred ninety-seven billion, seven hundred eighty-nine million, two hundred forty-six thousand, nine hundred twenty-eight".