68909800 has 72 divisors (see below), whose sum is σ = 167274450. Its totient is φ = 26369280.

The previous prime is 68909759. The next prime is 68909801. The reversal of 68909800 is 890986.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 13883076 + 55026724 = 3726^2 + 7418^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (68909801) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 632146 + ... + 632254.

Almost surely, 2^68909800 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 68909800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83637225).

68909800 is an abundant number, since it is smaller than the sum of its proper divisors (98364650).

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

68909800 is a wasteful number, since it uses less digits than its factorization.

68909800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 68909800 is about 8301.1926853917. The cubic root of 68909800 is about 409.9777897943.

The spelling of 68909800 in words is "sixty-eight million, nine hundred nine thousand, eight hundred".