128182197 has 48 divisors (see below), whose sum is σ = 211284864. Its totient is φ = 68534400.

The previous prime is 128182181. The next prime is 128182199. The reversal of 128182197 is 791281821.

It is not a de Polignac number, because 128182197 - 2⁴ = 128182181 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128182199) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107947 + ... + 109127.

It is an arithmetic number, because the mean of its divisors is an integer number (4401768).

Almost surely, 2^128182197 is an apocalyptic number.

It is an amenable number.

128182197 is a deficient number, since it is larger than the sum of its proper divisors (83102667).

128182197 is a wasteful number, since it uses less digits than its factorization.

128182197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1231 counting only the distinct ones).

The product of its digits is 16128, while the sum is 39.

The square root of 128182197 is about 11321.7576815616. The cubic root of 128182197 is about 504.2074251713.

The spelling of 128182197 in words is "one hundred twenty-eight million, one hundred eighty-two thousand, one hundred ninety-seven".