128563406 has 8 divisors (see below), whose sum is σ = 192893400. Its totient is φ = 64265608.

The previous prime is 128563397. The next prime is 128563411. The reversal of 128563406 is 604365821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

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, 10325 + ... + 19071.

It is an arithmetic number, because the mean of its divisors is an integer number (24111675).

Almost surely, 2^128563406 is an apocalyptic number.

128563406 is a deficient number, since it is larger than the sum of its proper divisors (64329994).

128563406 is an equidigital number, since it uses as much as digits as its factorization.

128563406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16098.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 128563406 is about 11338.5804226102. The cubic root of 128563406 is about 504.7067617585.

The spelling of 128563406 in words is "one hundred twenty-eight million, five hundred sixty-three thousand, four hundred six".