68331380 has 48 divisors (see below), whose sum is σ = 155267280. Its totient is φ = 25110528.

The previous prime is 68331317. The next prime is 68331383. The reversal of 68331380 is 8313386.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 4682896 + 63648484 = 2164^2 + 7978^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68331383) 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, 69452 + ... + 70428.

It is an arithmetic number, because the mean of its divisors is an integer number (3234735).

Almost surely, 2^68331380 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 68331380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77633640).

68331380 is an abundant number, since it is smaller than the sum of its proper divisors (86935900).

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

68331380 is a wasteful number, since it uses less digits than its factorization.

68331380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1266 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 68331380 is about 8266.2796952438. The cubic root of 68331380 is about 408.8274649230.

The spelling of 68331380 in words is "sixty-eight million, three hundred thirty-one thousand, three hundred eighty".