67128336 has 60 divisors (see below), whose sum is σ = 204949680. Its totient is φ = 20341440.

The previous prime is 67128331. The next prime is 67128343. The reversal of 67128336 is 63382176.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 67128336.

It is not an unprimeable number, because it can be changed into a prime (67128331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19606 + ... + 22773.

It is an arithmetic number, because the mean of its divisors is an integer number (3415828).

Almost surely, 2^67128336 is an apocalyptic number.

67128336 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

67128336 is an abundant number, since it is smaller than the sum of its proper divisors (137821344).

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

67128336 is a wasteful number, since it uses less digits than its factorization.

67128336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42404 (or 42395 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 67128336 is about 8193.1883903643. The cubic root of 67128336 is about 406.4139694394.

The spelling of 67128336 in words is "sixty-seven million, one hundred twenty-eight thousand, three hundred thirty-six".