128445912 has 96 divisors (see below), whose sum is σ = 412339200. Its totient is φ = 36694944.

The previous prime is 128445899. The next prime is 128445913. The reversal of 128445912 is 219544821.

128445912 is a `hidden beast` number, since 1 + 28 + 44 + 591 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128445913) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8889 + ... + 18327.

It is an arithmetic number, because the mean of its divisors is an integer number (4295200).

Almost surely, 2^128445912 is an apocalyptic number.

128445912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128445912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206169600).

128445912 is an abundant number, since it is smaller than the sum of its proper divisors (283893288).

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

128445912 is an equidigital number, since it uses as much as digits as its factorization.

128445912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9467 (or 9451 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 128445912 is about 11333.3980782464. The cubic root of 128445912 is about 504.5529645207.

It can be divided in two parts, 128 and 445912, that added together give a triangular number (446040 = T₉₄₄).

The spelling of 128445912 in words is "one hundred twenty-eight million, four hundred forty-five thousand, nine hundred twelve".