128113100 has 18 divisors (see below), whose sum is σ = 278005644. Its totient is φ = 51245200.

The previous prime is 128113087. The next prime is 128113121. The reversal of 128113100 is 1311821.

It is a super-2 number, since 2×128113100² = 32825932783220000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 640466 + ... + 640665.

It is an arithmetic number, because the mean of its divisors is an integer number (15444758).

Almost surely, 2^128113100 is an apocalyptic number.

128113100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128113100 is an abundant number, since it is smaller than the sum of its proper divisors (149892544).

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

128113100 is a wasteful number, since it uses less digits than its factorization.

128113100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281145 (or 1281138 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 17.

The square root of 128113100 is about 11318.7057564017. The cubic root of 128113100 is about 504.1168107095.

Adding to 128113100 its reverse (1311821), we get a palindrome (129424921).

The spelling of 128113100 in words is "one hundred twenty-eight million, one hundred thirteen thousand, one hundred".