68840000 has 70 divisors (see below), whose sum is σ = 170800014. Its totient is φ = 27520000.

The previous prime is 68839973. The next prime is 68840011. The reversal of 68840000 is 4886.

It can be written as a sum of positive squares in 5 ways, for example, as 18939904 + 49900096 = 4352^2 + 7064^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 39140 + ... + 40860.

Almost surely, 2^68840000 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 68840000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85400007).

68840000 is an abundant number, since it is smaller than the sum of its proper divisors (101960014).

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

68840000 is an equidigital number, since it uses as much as digits as its factorization.

68840000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1753 (or 1728 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 68840000 is about 8296.9874050766. The cubic root of 68840000 is about 409.8393183567.

Adding to 68840000 its reverse (4886), we get a palindrome (68844886).

The spelling of 68840000 in words is "sixty-eight million, eight hundred forty thousand".