67839980 has 36 divisors (see below), whose sum is σ = 154273392. Its totient is φ = 25047360.

The previous prime is 67839973. The next prime is 67840001. The reversal of 67839980 is 8993876.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6656 + ... + 13415.

It is an arithmetic number, because the mean of its divisors is an integer number (4285372).

Almost surely, 2^67839980 is an apocalyptic number.

It is an amenable number.

67839980 is an abundant number, since it is smaller than the sum of its proper divisors (86433412).

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

67839980 is a wasteful number, since it uses less digits than its factorization.

67839980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20106 (or 20091 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 67839980 is about 8236.5028986822. The cubic root of 67839980 is about 407.8450888898.

The spelling of 67839980 in words is "sixty-seven million, eight hundred thirty-nine thousand, nine hundred eighty".