68906250 has 144 divisors (see below), whose sum is σ = 217089288. Its totient is φ = 15750000.

The previous prime is 68906239. The next prime is 68906303. The reversal of 68906250 is 5260986.

It can be written as a sum of positive squares in 4 ways, for example, as 41563809 + 27342441 = 6447^2 + 5229^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9843747 + ... + 9843753.

Almost surely, 2^68906250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68906250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108544644).

68906250 is an abundant number, since it is smaller than the sum of its proper divisors (148183038).

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

68906250 is an frugal number, since it uses more digits than its factorization.

68906250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 68906250 is about 8300.9788579420. The cubic root of 68906250 is about 409.9707494500.

The spelling of 68906250 in words is "sixty-eight million, nine hundred six thousand, two hundred fifty".