68781336 has 64 divisors (see below), whose sum is σ = 187336800. Its totient is φ = 20917248.

The previous prime is 68781331. The next prime is 68781341. The reversal of 68781336 is 63318786.

It is an interprime number because it is at equal distance from previous prime (68781331) and next prime (68781341).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68781331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26530 + ... + 29006.

Almost surely, 2^68781336 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 68781336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93668400).

68781336 is an abundant number, since it is smaller than the sum of its proper divisors (118555464).

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

68781336 is a wasteful number, since it uses less digits than its factorization.

68781336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2588 (or 2584 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 68781336 is about 8293.4513925145. The cubic root of 68781336 is about 409.7228664557.

The spelling of 68781336 in words is "sixty-eight million, seven hundred eighty-one thousand, three hundred thirty-six".