128850105 has 16 divisors (see below), whose sum is σ = 212811264. Its totient is φ = 66503040.

The previous prime is 128850101. The next prime is 128850121. The reversal of 128850105 is 501058821.

It is not a de Polignac number, because 128850105 - 2² = 128850101 is a prime.

It is a super-2 number, since 2×128850105² = 33204699117022050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128850101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138084 + ... + 139013.

It is an arithmetic number, because the mean of its divisors is an integer number (13300704).

Almost surely, 2^128850105 is an apocalyptic number.

128850105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128850105 is a deficient number, since it is larger than the sum of its proper divisors (83961159).

128850105 is a wasteful number, since it uses less digits than its factorization.

128850105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277136.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 128850105 is about 11351.2160141546. The cubic root of 128850105 is about 505.0816519934.

The spelling of 128850105 in words is "one hundred twenty-eight million, eight hundred fifty thousand, one hundred five".