67139868 has 48 divisors (see below), whose sum is σ = 166471200. Its totient is φ = 20987904.

The previous prime is 67139861. The next prime is 67139873. The reversal of 67139868 is 86893176.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67139861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91230 + ... + 91962.

It is an arithmetic number, because the mean of its divisors is an integer number (3468150).

Almost surely, 2^67139868 is an apocalyptic number.

67139868 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 67139868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83235600).

67139868 is an abundant number, since it is smaller than the sum of its proper divisors (99331332).

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

67139868 is a wasteful number, since it uses less digits than its factorization.

67139868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1204 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 67139868 is about 8193.8921154724. The cubic root of 67139868 is about 406.4372407722.

The spelling of 67139868 in words is "sixty-seven million, one hundred thirty-nine thousand, eight hundred sixty-eight".