128804906 has 16 divisors (see below), whose sum is σ = 197920800. Its totient is φ = 62847408.

The previous prime is 128804891. The next prime is 128804911. The reversal of 128804906 is 609408821.

It is a self number, because there is not a number n which added to its sum of digits gives 128804906.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12476 + ... + 20328.

It is an arithmetic number, because the mean of its divisors is an integer number (12370050).

Almost surely, 2^128804906 is an apocalyptic number.

128804906 is a deficient number, since it is larger than the sum of its proper divisors (69115894).

128804906 is a wasteful number, since it uses less digits than its factorization.

128804906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 128804906 is about 11349.2249074551. The cubic root of 128804906 is about 505.0225863178.

The spelling of 128804906 in words is "one hundred twenty-eight million, eight hundred four thousand, nine hundred six".