68865940 has 96 divisors (see below), whose sum is σ = 172166400. Its totient is φ = 22999680.

The previous prime is 68865913. The next prime is 68865961. The reversal of 68865940 is 4956886.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 345961 + ... + 346159.

It is an arithmetic number, because the mean of its divisors is an integer number (1793400).

Almost surely, 2^68865940 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 68865940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86083200).

68865940 is an abundant number, since it is smaller than the sum of its proper divisors (103300460).

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

68865940 is a wasteful number, since it uses less digits than its factorization.

68865940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 68865940 is about 8298.5504758361. The cubic root of 68865940 is about 409.8907898697.

The spelling of 68865940 in words is "sixty-eight million, eight hundred sixty-five thousand, nine hundred forty".