128915270 has 16 divisors (see below), whose sum is σ = 253142928. Its totient is φ = 46878240.

The previous prime is 128915261. The next prime is 128915279. The reversal of 128915270 is 72519821.

It is an interprime number because it is at equal distance from previous prime (128915261) and next prime (128915279).

It is a self number, because there is not a number n which added to its sum of digits gives 128915270.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128915279) 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, 585869 + ... + 586088.

It is an arithmetic number, because the mean of its divisors is an integer number (15821433).

Almost surely, 2^128915270 is an apocalyptic number.

128915270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128915270 is a deficient number, since it is larger than the sum of its proper divisors (124227658).

128915270 is a wasteful number, since it uses less digits than its factorization.

128915270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1171975.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 128915270 is about 11354.0860486435. The cubic root of 128915270 is about 505.1667847628.

The spelling of 128915270 in words is "one hundred twenty-eight million, nine hundred fifteen thousand, two hundred seventy".