128563404 has 12 divisors (see below), whose sum is σ = 299981304. Its totient is φ = 42854464.

The previous prime is 128563397. The next prime is 128563411. The reversal of 128563404 is 404365821.

It is an interprime number because it is at equal distance from previous prime (128563397) and next prime (128563411).

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5356797 + ... + 5356820.

It is an arithmetic number, because the mean of its divisors is an integer number (24998442).

Almost surely, 2^128563404 is an apocalyptic number.

It is an amenable number.

128563404 is an abundant number, since it is smaller than the sum of its proper divisors (171417900).

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

128563404 is a wasteful number, since it uses less digits than its factorization.

128563404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10713624 (or 10713622 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 128563404 is about 11338.5803344158. The cubic root of 128563404 is about 504.7067591413.

The spelling of 128563404 in words is "one hundred twenty-eight million, five hundred sixty-three thousand, four hundred four".