128404000 has 96 divisors (see below), whose sum is σ = 322672896. Its totient is φ = 50195200.

The previous prime is 128403991. The next prime is 128404013. The reversal of 128404000 is 404821.

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, 187659 + ... + 188341.

It is an arithmetic number, because the mean of its divisors is an integer number (3361176).

Almost surely, 2^128404000 is an apocalyptic number.

128404000 is a gapful number since it is divisible by the number (10) 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 128404000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161336448).

128404000 is an abundant number, since it is smaller than the sum of its proper divisors (194268896).

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

128404000 is an equidigital number, since it uses as much as digits as its factorization.

128404000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 737 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 128404000 is about 11331.5488791250. The cubic root of 128404000 is about 504.4980798770.

Adding to 128404000 its reverse (404821), we get a palindrome (128808821).

The spelling of 128404000 in words is "one hundred twenty-eight million, four hundred four thousand".