128707812 has 24 divisors (see below), whose sum is σ = 333687200. Its totient is φ = 42902568.

The previous prime is 128707811. The next prime is 128707823. The reversal of 128707812 is 218707821.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (128707811) 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 7 ways as a sum of consecutive naturals, for example, 595762 + ... + 595977.

Almost surely, 2^128707812 is an apocalyptic number.

128707812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128707812 is an abundant number, since it is smaller than the sum of its proper divisors (204979388).

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

128707812 is a wasteful number, since it uses less digits than its factorization.

128707812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191752 (or 1191744 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 128707812 is about 11344.9465402002. The cubic root of 128707812 is about 504.8956579511.

Subtracting 128707812 from its reverse (218707821), we obtain a palindrome (90000009).

The spelling of 128707812 in words is "one hundred twenty-eight million, seven hundred seven thousand, eight hundred twelve".