67143280 has 40 divisors (see below), whose sum is σ = 158320224. Its totient is φ = 26476800.

The previous prime is 67143277. The next prime is 67143287. The reversal of 67143280 is 8234176.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67143287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231 + ... + 11590.

Almost surely, 2^67143280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67143280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79160112).

67143280 is an abundant number, since it is smaller than the sum of its proper divisors (91176944).

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

67143280 is a wasteful number, since it uses less digits than its factorization.

67143280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11905 (or 11899 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 67143280 is about 8194.1003166913. The cubic root of 67143280 is about 406.4441256054. Note that the first 3 decimals are identical.

The spelling of 67143280 in words is "sixty-seven million, one hundred forty-three thousand, two hundred eighty".