128885806 has 16 divisors (see below), whose sum is σ = 233944416. Its totient is φ = 51987456.

The previous prime is 128885761. The next prime is 128885839. The reversal of 128885806 is 608588821.

It is a super-2 number, since 2×128885806² = 33223101976539272, which contains 22 as substring.

It is a congruent number.

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, 270531 + ... + 271006.

It is an arithmetic number, because the mean of its divisors is an integer number (14621526).

Almost surely, 2^128885806 is an apocalyptic number.

128885806 is a deficient number, since it is larger than the sum of its proper divisors (105058610).

128885806 is a wasteful number, since it uses less digits than its factorization.

128885806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541563.

The product of its (nonzero) digits is 245760, while the sum is 46.

The square root of 128885806 is about 11352.7884680373. The cubic root of 128885806 is about 505.1282959987.

The spelling of 128885806 in words is "one hundred twenty-eight million, eight hundred eighty-five thousand, eight hundred six".