128144680 has 32 divisors (see below), whose sum is σ = 295361640. Its totient is φ = 50007040.

The previous prime is 128144677. The next prime is 128144719. The reversal of 128144680 is 86441821.

It can be written as a sum of positive squares in 4 ways, for example, as 83868964 + 44275716 = 9158^2 + 6654^2 .

It is a super-3 number, since 3×128144680³ (a number of 25 digits) contains 333 as substring.

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 7 ways as a sum of consecutive naturals, for example, 37429 + ... + 40708.

Almost surely, 2^128144680 is an apocalyptic number.

128144680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128144680 is an abundant number, since it is smaller than the sum of its proper divisors (167216960).

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

128144680 is a wasteful number, since it uses less digits than its factorization.

128144680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78189 (or 78185 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 128144680 is about 11320.1007062658. The cubic root of 128144680 is about 504.1582290629.

The spelling of 128144680 in words is "one hundred twenty-eight million, one hundred forty-four thousand, six hundred eighty".