68243136 has 112 divisors (see below), whose sum is σ = 204825600. Its totient is φ = 19878912.

The previous prime is 68243113. The next prime is 68243143. The reversal of 68243136 is 63134286.

It is a super-2 number, since 2×68243136² = 9314251222228992, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 68243097 and 68243106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46705 + ... + 48143.

It is an arithmetic number, because the mean of its divisors is an integer number (1828800).

Almost surely, 2^68243136 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 68243136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102412800).

68243136 is an abundant number, since it is smaller than the sum of its proper divisors (136582464).

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

68243136 is a wasteful number, since it uses less digits than its factorization.

68243136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1476 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 68243136 is about 8260.9403823052. The cubic root of 68243136 is about 408.6514008078.

The spelling of 68243136 in words is "sixty-eight million, two hundred forty-three thousand, one hundred thirty-six".