68819136 has 56 divisors (see below), whose sum is σ = 183001920. Its totient is φ = 22824192.

The previous prime is 68819131. The next prime is 68819143. The reversal of 68819136 is 63191886.

It is not an unprimeable number, because it can be changed into a prime (68819131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42795 + ... + 44373.

Almost surely, 2^68819136 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 68819136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91500960).

68819136 is an abundant number, since it is smaller than the sum of its proper divisors (114182784).

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

68819136 is a wasteful number, since it uses less digits than its factorization.

68819136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1821 (or 1811 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 68819136 is about 8295.7299859627. The cubic root of 68819136 is about 409.7979095268.

The spelling of 68819136 in words is "sixty-eight million, eight hundred nineteen thousand, one hundred thirty-six".