67887920 has 20 divisors (see below), whose sum is σ = 157839600. Its totient is φ = 27155136.

The previous prime is 67887917. The next prime is 67888001. The reversal of 67887920 is 2978876.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 424220 + ... + 424379.

It is an arithmetic number, because the mean of its divisors is an integer number (7891980).

Almost surely, 2^67887920 is an apocalyptic number.

It is an amenable number.

67887920 is an abundant number, since it is smaller than the sum of its proper divisors (89951680).

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

67887920 is a wasteful number, since it uses less digits than its factorization.

67887920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848612 (or 848606 counting only the distinct ones).

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

The square root of 67887920 is about 8239.4126004224. The cubic root of 67887920 is about 407.9411359394.

The spelling of 67887920 in words is "sixty-seven million, eight hundred eighty-seven thousand, nine hundred twenty".