68880820 has 48 divisors (see below), whose sum is σ = 149361408. Its totient is φ = 26666240.

The previous prime is 68880751. The next prime is 68880839. The reversal of 68880820 is 2808886.

It is a congruent number.

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, 136689 + ... + 137191.

It is an arithmetic number, because the mean of its divisors is an integer number (3111696).

Almost surely, 2^68880820 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 68880820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74680704).

68880820 is an abundant number, since it is smaller than the sum of its proper divisors (80480588).

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

68880820 is a wasteful number, since it uses less digits than its factorization.

68880820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720 (or 718 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 68880820 is about 8299.4469695275. The cubic root of 68880820 is about 409.9203097151.

The spelling of 68880820 in words is "sixty-eight million, eight hundred eighty thousand, eight hundred twenty".