128765270 has 16 divisors (see below), whose sum is σ = 241855200. Its totient is φ = 49266624.

The previous prime is 128765257. The next prime is 128765279. The reversal of 128765270 is 72567821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128765279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279695 + ... + 280154.

It is an arithmetic number, because the mean of its divisors is an integer number (15115950).

Almost surely, 2^128765270 is an apocalyptic number.

128765270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128765270 is a deficient number, since it is larger than the sum of its proper divisors (113089930).

128765270 is a wasteful number, since it uses less digits than its factorization.

128765270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559879.

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 128765270 is about 11347.4785745557. The cubic root of 128765270 is about 504.9707789516.

The spelling of 128765270 in words is "one hundred twenty-eight million, seven hundred sixty-five thousand, two hundred seventy".