68345920 has 56 divisors (see below), whose sum is σ = 166567104. Its totient is φ = 26697216.

The previous prime is 68345911. The next prime is 68345951. The reversal of 68345920 is 2954386.

It is a self number, because there is not a number n which added to its sum of digits gives 68345920.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11277 + ... + 16243.

Almost surely, 2^68345920 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 68345920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83283552).

68345920 is an abundant number, since it is smaller than the sum of its proper divisors (98221184).

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

68345920 is a wasteful number, since it uses less digits than its factorization.

68345920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5027 (or 5017 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 68345920 is about 8267.1591251167. The cubic root of 68345920 is about 408.8564605312.

The spelling of 68345920 in words is "sixty-eight million, three hundred forty-five thousand, nine hundred twenty".