128596643 has 16 divisors (see below), whose sum is σ = 152928000. Its totient is φ = 105800352.

The previous prime is 128596639. The next prime is 128596667. The reversal of 128596643 is 346695821.

It is not a de Polignac number, because 128596643 - 2² = 128596639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128596594 and 128596603.

It is not an unprimeable number, because it can be changed into a prime (128596613) 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, 34568 + ... + 38106.

It is an arithmetic number, because the mean of its divisors is an integer number (9558000).

Almost surely, 2^128596643 is an apocalyptic number.

128596643 is a deficient number, since it is larger than the sum of its proper divisors (24331357).

128596643 is a wasteful number, since it uses less digits than its factorization.

128596643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754.

The product of its digits is 311040, while the sum is 44.

The square root of 128596643 is about 11340.0459875611. The cubic root of 128596643 is about 504.7502513065.

The spelling of 128596643 in words is "one hundred twenty-eight million, five hundred ninety-six thousand, six hundred forty-three".