67809872 has 80 divisors (see below), whose sum is σ = 151990272. Its totient is φ = 29030400.

The previous prime is 67809851. The next prime is 67809883. The reversal of 67809872 is 27890876.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448997 + ... + 449147.

Almost surely, 2^67809872 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 67809872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75995136).

67809872 is an abundant number, since it is smaller than the sum of its proper divisors (84180400).

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

67809872 is a wasteful number, since it uses less digits than its factorization.

67809872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 67809872 is about 8234.6749784069. The cubic root of 67809872 is about 407.7847448421.

The spelling of 67809872 in words is "sixty-seven million, eight hundred nine thousand, eight hundred seventy-two".