128420676 has 36 divisors (see below), whose sum is σ = 324969372. Its totient is φ = 42760704.

The previous prime is 128420659. The next prime is 128420687. The reversal of 128420676 is 676024821.

It can be written as a sum of positive squares in 2 ways, for example, as 33942276 + 94478400 = 5826^2 + 9720^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 128420676.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54760 + ... + 57056.

It is an arithmetic number, because the mean of its divisors is an integer number (9026927).

Almost surely, 2^128420676 is an apocalyptic number.

It is an amenable number.

128420676 is an abundant number, since it is smaller than the sum of its proper divisors (196548696).

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

128420676 is a wasteful number, since it uses less digits than its factorization.

128420676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3860 (or 3855 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 128420676 is about 11332.2846769749. The cubic root of 128420676 is about 504.5199188794.

The spelling of 128420676 in words is "one hundred twenty-eight million, four hundred twenty thousand, six hundred seventy-six".