128343100 has 72 divisors (see below), whose sum is σ = 302758400. Its totient is φ = 47044800.

The previous prime is 128343091. The next prime is 128343101. The reversal of 128343100 is 1343821.

It is a super-2 number, since 2×128343100² = 32943902635220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128343101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57811 + ... + 59989.

Almost surely, 2^128343100 is an apocalyptic number.

128343100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128343100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151379200).

128343100 is an abundant number, since it is smaller than the sum of its proper divisors (174415300).

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

128343100 is a wasteful number, since it uses less digits than its factorization.

128343100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2243 (or 2236 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 128343100 is about 11328.8613726182. The cubic root of 128343100 is about 504.4183087597.

Adding to 128343100 its reverse (1343821), we get a palindrome (129686921).

The spelling of 128343100 in words is "one hundred twenty-eight million, three hundred forty-three thousand, one hundred".