128404032 has 56 divisors (see below), whose sum is σ = 354518976. Its totient is φ = 40939008.

The previous prime is 128404021. The next prime is 128404037. The reversal of 128404032 is 230404821.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 128403993 and 128404011.

It is not an unprimeable number, because it can be changed into a prime (128404037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10123 + ... + 18954.

It is an arithmetic number, because the mean of its divisors is an integer number (6330696).

Almost surely, 2^128404032 is an apocalyptic number.

128404032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128404032 is an abundant number, since it is smaller than the sum of its proper divisors (226114944).

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

128404032 is a wasteful number, since it uses less digits than its factorization.

128404032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29115 (or 29105 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 128404032 is about 11331.5502911120. The cubic root of 128404032 is about 504.4981217862.

Adding to 128404032 its reverse (230404821), we get a palindrome (358808853).

The spelling of 128404032 in words is "one hundred twenty-eight million, four hundred four thousand, thirty-two".