68167820 has 96 divisors (see below), whose sum is σ = 176064000. Its totient is φ = 22099392.

The previous prime is 68167811. The next prime is 68167823. The reversal of 68167820 is 2876186.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (68167823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130079 + ... + 130601.

It is an arithmetic number, because the mean of its divisors is an integer number (1834000).

Almost surely, 2^68167820 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 68167820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (88032000).

68167820 is an abundant number, since it is smaller than the sum of its proper divisors (107896180).

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

68167820 is a wasteful number, since it uses less digits than its factorization.

68167820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 556 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 68167820 is about 8256.3805629343. The cubic root of 68167820 is about 408.5010105010.

The spelling of 68167820 in words is "sixty-eight million, one hundred sixty-seven thousand, eight hundred twenty".