68640200 has 48 divisors (see below), whose sum is σ = 164751360. Its totient is φ = 26568000.

The previous prime is 68640193. The next prime is 68640233. The reversal of 68640200 is 204686.

It is a super-2 number, since 2×68640200² = 9422954112080000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68640200.

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 11 ways as a sum of consecutive naturals, for example, 665 + ... + 11735.

It is an arithmetic number, because the mean of its divisors is an integer number (3432320).

Almost surely, 2^68640200 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 68640200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82375680).

68640200 is an abundant number, since it is smaller than the sum of its proper divisors (96111160).

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

68640200 is a wasteful number, since it uses less digits than its factorization.

68640200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11118 (or 11109 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 68640200 is about 8284.9381409881. The cubic root of 68640200 is about 409.4424306694.

Adding to 68640200 its reverse (204686), we get a palindrome (68844886).

The spelling of 68640200 in words is "sixty-eight million, six hundred forty thousand, two hundred".