128580492 has 24 divisors (see below), whose sum is σ = 306999616. Its totient is φ = 41863248.

The previous prime is 128580457. The next prime is 128580493. The reversal of 128580492 is 294085821.

It is a self number, because there is not a number n which added to its sum of digits gives 128580492.

It is not an unprimeable number, because it can be changed into a prime (128580493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124078 + ... + 125109.

Almost surely, 2^128580492 is an apocalyptic number.

128580492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128580492 is an abundant number, since it is smaller than the sum of its proper divisors (178419124).

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

128580492 is a wasteful number, since it uses less digits than its factorization.

128580492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249237 (or 249235 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 128580492 is about 11339.3338428675. Note that the first 3 decimals coincide. The cubic root of 128580492 is about 504.7291191773.

The spelling of 128580492 in words is "one hundred twenty-eight million, five hundred eighty thousand, four hundred ninety-two".