197794728 has 96 divisors (see below), whose sum is σ = 578097000. Its totient is φ = 60862464.

The previous prime is 197794721. The next prime is 197794759. The reversal of 197794728 is 827497791.

197794728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 173765124 + 24029604 = 13182^2 + 4902^2 .

It is not an unprimeable number, because it can be changed into a prime (197794721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63348 + ... + 66396.

Almost surely, 2^197794728 is an apocalyptic number.

197794728 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 197794728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289048500).

197794728 is an abundant number, since it is smaller than the sum of its proper divisors (380302272).

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

197794728 is a wasteful number, since it uses less digits than its factorization.

197794728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131 (or 3124 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 197794728 is about 14063.9513651036. The cubic root of 197794728 is about 582.6461806553.

The spelling of 197794728 in words is "one hundred ninety-seven million, seven hundred ninety-four thousand, seven hundred twenty-eight".