67879856 has 80 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 28604160.

The previous prime is 67879841. The next prime is 67879871. The reversal of 67879856 is 65897876.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (67879841) and next prime (67879871).

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 15 ways as a sum of consecutive naturals, for example, 177041 + ... + 177423.

It is an arithmetic number, because the mean of its divisors is an integer number (1928448).

Almost surely, 2^67879856 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 67879856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77137920).

67879856 is an abundant number, since it is smaller than the sum of its proper divisors (86395984).

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

67879856 is a wasteful number, since it uses less digits than its factorization.

67879856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 468 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 56.

The square root of 67879856 is about 8238.9232306170. The cubic root of 67879856 is about 407.9249830039.

The spelling of 67879856 in words is "sixty-seven million, eight hundred seventy-nine thousand, eight hundred fifty-six".