128700424 has 8 divisors (see below), whose sum is σ = 241313310. Its totient is φ = 64350208.

The previous prime is 128700391. The next prime is 128700431. The reversal of 128700424 is 424007821.

It can be written as a sum of positive squares in only one way, i.e., 83137924 + 45562500 = 9118^2 + 6750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 128700392 and 128700401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8043769 + ... + 8043784.

Almost surely, 2^128700424 is an apocalyptic number.

It is an amenable number.

128700424 is a deficient number, since it is larger than the sum of its proper divisors (112612886).

128700424 is a wasteful number, since it uses less digits than its factorization.

128700424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16087559 (or 16087555 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 128700424 is about 11344.6209279993. The cubic root of 128700424 is about 504.8859972049.

The spelling of 128700424 in words is "one hundred twenty-eight million, seven hundred thousand, four hundred twenty-four".