128643364 has 24 divisors (see below), whose sum is σ = 230186880. Its totient is φ = 62887776.

The previous prime is 128643343. The next prime is 128643379. The reversal of 128643364 is 463346821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45109 + ... + 47875.

It is an arithmetic number, because the mean of its divisors is an integer number (9591120).

Almost surely, 2^128643364 is an apocalyptic number.

It is an amenable number.

128643364 is a deficient number, since it is larger than the sum of its proper divisors (101543516).

128643364 is a wasteful number, since it uses less digits than its factorization.

128643364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3027 (or 3025 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 128643364 is about 11342.1058009525. The cubic root of 128643364 is about 504.8113715675.

The spelling of 128643364 in words is "one hundred twenty-eight million, six hundred forty-three thousand, three hundred sixty-four".