128444628 has 48 divisors (see below), whose sum is σ = 327602240. Its totient is φ = 38928384.

The previous prime is 128444597. The next prime is 128444633. The reversal of 128444628 is 826444821.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4308 + ... + 16596.

Almost surely, 2^128444628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128444628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163801120).

128444628 is an abundant number, since it is smaller than the sum of its proper divisors (199157612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128444628 is a wasteful number, since it uses less digits than its factorization.

128444628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12376 (or 12374 counting only the distinct ones).

The product of its digits is 98304, while the sum is 39.

The square root of 128444628 is about 11333.3414313697. The cubic root of 128444628 is about 504.5512832730.

The spelling of 128444628 in words is "one hundred twenty-eight million, four hundred forty-four thousand, six hundred twenty-eight".