68847720 has 64 divisors (see below), whose sum is σ = 207126720. Its totient is φ = 18307584.

The previous prime is 68847703. The next prime is 68847721. The reversal of 68847720 is 2774886.

It is not an unprimeable number, because it can be changed into a prime (68847721) 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, 62212 + ... + 63308.

It is an arithmetic number, because the mean of its divisors is an integer number (3236355).

Almost surely, 2^68847720 is an apocalyptic number.

68847720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68847720 is an abundant number, since it is smaller than the sum of its proper divisors (138279000).

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

68847720 is a wasteful number, since it uses less digits than its factorization.

68847720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634 (or 1630 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 68847720 is about 8297.4526211362. The cubic root of 68847720 is about 409.8546381382.

The spelling of 68847720 in words is "sixty-eight million, eight hundred forty-seven thousand, seven hundred twenty".