68980340 has 96 divisors (see below), whose sum is σ = 172730880. Its totient is φ = 22809600.

The previous prime is 68980333. The next prime is 68980343. The reversal of 68980340 is 4308986.

68980340 = 836² + 837² + ... + 924².

It is a junction number, because it is equal to n+sod(n) for n = 68980294 and 68980303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68980343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254405 + ... + 254675.

It is an arithmetic number, because the mean of its divisors is an integer number (1799280).

Almost surely, 2^68980340 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 68980340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86365440).

68980340 is an abundant number, since it is smaller than the sum of its proper divisors (103750540).

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

68980340 is a wasteful number, since it uses less digits than its factorization.

68980340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 68980340 is about 8305.4403856749. The cubic root of 68980340 is about 410.1176343007.

The spelling of 68980340 in words is "sixty-eight million, nine hundred eighty thousand, three hundred forty".