128444648 has 16 divisors (see below), whose sum is σ = 241056960. Its totient is φ = 64162800.

The previous prime is 128444633. The next prime is 128444651. The reversal of 128444648 is 846444821.

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, 2513 + ... + 16223.

It is an arithmetic number, because the mean of its divisors is an integer number (15066060).

Almost surely, 2^128444648 is an apocalyptic number.

It is an amenable number.

128444648 is a deficient number, since it is larger than the sum of its proper divisors (112612312).

128444648 is a wasteful number, since it uses less digits than its factorization.

128444648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14888 (or 14884 counting only the distinct ones).

The product of its digits is 196608, while the sum is 41.

The square root of 128444648 is about 11333.3423137219. The cubic root of 128444648 is about 504.5513094608.

The spelling of 128444648 in words is "one hundred twenty-eight million, four hundred forty-four thousand, six hundred forty-eight".