128956814 has 32 divisors (see below), whose sum is σ = 235616256. Its totient is φ = 51733440.

The previous prime is 128956813. The next prime is 128956829. The reversal of 128956814 is 418659821.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128956811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10874 + ... + 19394.

It is an arithmetic number, because the mean of its divisors is an integer number (7363008).

Almost surely, 2^128956814 is an apocalyptic number.

128956814 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

128956814 is a deficient number, since it is larger than the sum of its proper divisors (106659442).

128956814 is a wasteful number, since it uses less digits than its factorization.

128956814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8600.

The product of its digits is 138240, while the sum is 44.

The square root of 128956814 is about 11355.9153748168. The cubic root of 128956814 is about 505.2210436439.

The spelling of 128956814 in words is "one hundred twenty-eight million, nine hundred fifty-six thousand, eight hundred fourteen".