128312004 has 24 divisors (see below), whose sum is σ = 307487488. Its totient is φ = 41614560.

The previous prime is 128312003. The next prime is 128312017. The reversal of 128312004 is 400213821.

It is not an unprimeable number, because it can be changed into a prime (128312003) 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, 144052 + ... + 144939.

Almost surely, 2^128312004 is an apocalyptic number.

It is an amenable number.

128312004 is an abundant number, since it is smaller than the sum of its proper divisors (179175484).

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

128312004 is a wasteful number, since it uses less digits than its factorization.

128312004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289035 (or 289033 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 128312004 is about 11327.4888655871. The cubic root of 128312004 is about 504.3775672922.

Adding to 128312004 its reverse (400213821), we get a palindrome (528525825).

The spelling of 128312004 in words is "one hundred twenty-eight million, three hundred twelve thousand, four".