68817320 has 128 divisors (see below), whose sum is σ = 186157440. Its totient is φ = 22563840.

The previous prime is 68817317. The next prime is 68817323. The reversal of 68817320 is 2371886.

It is an interprime number because it is at equal distance from previous prime (68817317) and next prime (68817323).

It is not an unprimeable number, because it can be changed into a prime (68817323) 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, 303047 + ... + 303273.

It is an arithmetic number, because the mean of its divisors is an integer number (1454355).

Almost surely, 2^68817320 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 68817320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93078720).

68817320 is an abundant number, since it is smaller than the sum of its proper divisors (117340120).

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

68817320 is a wasteful number, since it uses less digits than its factorization.

68817320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 311 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 68817320 is about 8295.6205313406. The cubic root of 68817320 is about 409.7943049114.

The spelling of 68817320 in words is "sixty-eight million, eight hundred seventeen thousand, three hundred twenty".