128064500 has 24 divisors (see below), whose sum is σ = 279693960. Its totient is φ = 51225600.

The previous prime is 128064499. The next prime is 128064509. The reversal of 128064500 is 5460821.

It can be written as a sum of positive squares in 4 ways, for example, as 4276624 + 123787876 = 2068^2 + 11126^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128064500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128064509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127565 + ... + 128564.

It is an arithmetic number, because the mean of its divisors is an integer number (11653915).

Almost surely, 2^128064500 is an apocalyptic number.

128064500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128064500 is an abundant number, since it is smaller than the sum of its proper divisors (151629460).

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

128064500 is a wasteful number, since it uses less digits than its factorization.

128064500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256148 (or 256136 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128064500 is about 11316.5586641876. The cubic root of 128064500 is about 504.0530566888.

The spelling of 128064500 in words is "one hundred twenty-eight million, sixty-four thousand, five hundred".