128458197 has 64 divisors (see below), whose sum is σ = 235008000. Its totient is φ = 67725504.

The previous prime is 128458193. The next prime is 128458217. The reversal of 128458197 is 791854821.

128458197 is a `hidden beast` number, since 1 + 2 + 8 + 458 + 197 = 666.

It is not a de Polignac number, because 128458197 - 2² = 128458193 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128458193) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 125554 + ... + 126572.

It is an arithmetic number, because the mean of its divisors is an integer number (3672000).

Almost surely, 2^128458197 is an apocalyptic number.

It is an amenable number.

128458197 is a deficient number, since it is larger than the sum of its proper divisors (106549803).

128458197 is a wasteful number, since it uses less digits than its factorization.

128458197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1087 (or 1081 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 128458197 is about 11333.9400474857. The cubic root of 128458197 is about 504.5690497233.

The spelling of 128458197 in words is "one hundred twenty-eight million, four hundred fifty-eight thousand, one hundred ninety-seven".