128498256 has 60 divisors (see below), whose sum is σ = 360378720. Its totient is φ = 42742080.

The previous prime is 128498239. The next prime is 128498261. The reversal of 128498256 is 652894821.

It is a congruent number.

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, 131851 + ... + 132821.

It is an arithmetic number, because the mean of its divisors is an integer number (6006312).

Almost surely, 2^128498256 is an apocalyptic number.

128498256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128498256 is an abundant number, since it is smaller than the sum of its proper divisors (231880464).

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

128498256 is a wasteful number, since it uses less digits than its factorization.

128498256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1895 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 128498256 is about 11335.7071239513. The cubic root of 128498256 is about 504.6214933232.

The spelling of 128498256 in words is "one hundred twenty-eight million, four hundred ninety-eight thousand, two hundred fifty-six".