128143944 has 40 divisors (see below), whose sum is σ = 358923510. Its totient is φ = 42714432.

The previous prime is 128143937. The next prime is 128143963. The reversal of 128143944 is 449341821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 113167044 + 14976900 = 10638^2 + 3870^2 .

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 128143899 and 128143908.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 98229 + ... + 99524.

Almost surely, 2^128143944 is an apocalyptic number.

It is an amenable number.

128143944 is an abundant number, since it is smaller than the sum of its proper divisors (230779566).

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

128143944 is a wasteful number, since it uses less digits than its factorization.

128143944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197771 (or 197758 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 128143944 is about 11320.0681976744. The cubic root of 128143944 is about 504.1572638488.

The spelling of 128143944 in words is "one hundred twenty-eight million, one hundred forty-three thousand, nine hundred forty-four".