128644514 has 8 divisors (see below), whose sum is σ = 194262300. Its totient is φ = 63890416.

The previous prime is 128644487. The next prime is 128644531. The reversal of 128644514 is 415446821.

It can be written as a sum of positive squares in 2 ways, for example, as 128074489 + 570025 = 11317^2 + 755^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215549 + ... + 216144.

Almost surely, 2^128644514 is an apocalyptic number.

128644514 is a deficient number, since it is larger than the sum of its proper divisors (65617786).

128644514 is a wasteful number, since it uses less digits than its factorization.

128644514 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431844.

The product of its digits is 30720, while the sum is 35.

The square root of 128644514 is about 11342.1564968925. The cubic root of 128644514 is about 504.8128758071.

The spelling of 128644514 in words is "one hundred twenty-eight million, six hundred forty-four thousand, five hundred fourteen".