128911514 has 8 divisors (see below), whose sum is σ = 193520928. Its totient is φ = 64404540.

The previous prime is 128911513. The next prime is 128911543. The reversal of 128911514 is 415119821.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128911513) 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, 22382 + ... + 27545.

It is an arithmetic number, because the mean of its divisors is an integer number (24190116).

Almost surely, 2^128911514 is an apocalyptic number.

128911514 is a deficient number, since it is larger than the sum of its proper divisors (64609414).

128911514 is a wasteful number, since it uses less digits than its factorization.

128911514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51220.

The product of its digits is 2880, while the sum is 32.

The square root of 128911514 is about 11353.9206444294. The cubic root of 128911514 is about 505.1618786337.

The spelling of 128911514 in words is "one hundred twenty-eight million, nine hundred eleven thousand, five hundred fourteen".