197011728 has 60 divisors (see below), whose sum is σ = 552309888. Its totient is φ = 65557440.

The previous prime is 197011697. The next prime is 197011747. The reversal of 197011728 is 827110791.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 197011692 and 197011701.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 147801 + ... + 149127.

Almost surely, 2^197011728 is an apocalyptic number.

197011728 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

197011728 is an abundant number, since it is smaller than the sum of its proper divisors (355298160).

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

197011728 is a wasteful number, since it uses less digits than its factorization.

197011728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2372 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The square root of 197011728 is about 14036.0866341014. The cubic root of 197011728 is about 581.8763332384.

The spelling of 197011728 in words is "one hundred ninety-seven million, eleven thousand, seven hundred twenty-eight".