128318100 has 36 divisors (see below), whose sum is σ = 371267904. Its totient is φ = 34218080.

The previous prime is 128318093. The next prime is 128318101. The reversal of 128318100 is 1813821.

It is a super-2 number, since 2×128318100² = 32931069575220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128318101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 213564 + ... + 214163.

Almost surely, 2^128318100 is an apocalyptic number.

128318100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128318100 is an abundant number, since it is smaller than the sum of its proper divisors (242949804).

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

128318100 is a wasteful number, since it uses less digits than its factorization.

128318100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427744 (or 427737 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 128318100 is about 11327.7579423291. The cubic root of 128318100 is about 504.3855546898.

The spelling of 128318100 in words is "one hundred twenty-eight million, three hundred eighteen thousand, one hundred".