197288100 has 108 divisors (see below), whose sum is σ = 621793536. Its totient is φ = 52320960.

The previous prime is 197288099. The next prime is 197288141. The reversal of 197288100 is 1882791.

It is a super-2 number, since 2×197288100² = 77845188803220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 200209 + ... + 201191.

Almost surely, 2^197288100 is an apocalyptic number.

197288100 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 197288100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (310896768).

197288100 is an abundant number, since it is smaller than the sum of its proper divisors (424505436).

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

197288100 is a wasteful number, since it uses less digits than its factorization.

197288100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 1216 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 197288100 is about 14045.9282356133. The cubic root of 197288100 is about 582.1482953669.

The spelling of 197288100 in words is "one hundred ninety-seven million, two hundred eighty-eight thousand, one hundred".