128770120 has 16 divisors (see below), whose sum is σ = 289732860. Its totient is φ = 51508032.

The previous prime is 128770111. The next prime is 128770127. The reversal of 128770120 is 21077821.

It can be written as a sum of positive squares in 2 ways, for example, as 126292644 + 2477476 = 11238^2 + 1574^2 .

It is not an unprimeable number, because it can be changed into a prime (128770127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1609587 + ... + 1609666.

Almost surely, 2^128770120 is an apocalyptic number.

128770120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128770120 is an abundant number, since it is smaller than the sum of its proper divisors (160962740).

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

128770120 is a wasteful number, since it uses less digits than its factorization.

128770120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219264 (or 3219260 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 128770120 is about 11347.6922764058. The cubic root of 128770120 is about 504.9771188535.

The spelling of 128770120 in words is "one hundred twenty-eight million, seven hundred seventy thousand, one hundred twenty".