128168700 has 72 divisors (see below), whose sum is σ = 404557440. Its totient is φ = 31070400.

The previous prime is 128168687. The next prime is 128168701. The reversal of 128168700 is 7861821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128168701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16120 + ... + 22719.

Almost surely, 2^128168700 is an apocalyptic number.

128168700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128168700 is an abundant number, since it is smaller than the sum of its proper divisors (276388740).

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

128168700 is a wasteful number, since it uses less digits than its factorization.

128168700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38867 (or 38860 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 128168700 is about 11321.1616011786. The cubic root of 128168700 is about 504.1897276370.

The spelling of 128168700 in words is "one hundred twenty-eight million, one hundred sixty-eight thousand, seven hundred".