128755570 has 8 divisors (see below), whose sum is σ = 231760044. Its totient is φ = 51502224.

The previous prime is 128755559. The next prime is 128755591. The reversal of 128755570 is 75557821.

It can be written as a sum of positive squares in 2 ways, for example, as 123143409 + 5612161 = 11097^2 + 2369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6437769 + ... + 6437788.

Almost surely, 2^128755570 is an apocalyptic number.

128755570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128755570 is a deficient number, since it is larger than the sum of its proper divisors (103004474).

128755570 is a wasteful number, since it uses less digits than its factorization.

128755570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12875564.

The product of its (nonzero) digits is 98000, while the sum is 40.

The square root of 128755570 is about 11347.0511587813. The cubic root of 128755570 is about 504.9580986703.

The spelling of 128755570 in words is "one hundred twenty-eight million, seven hundred fifty-five thousand, five hundred seventy".