68388936 has 128 divisors (see below), whose sum is σ = 222566400. Its totient is φ = 16980480.

The previous prime is 68388917. The next prime is 68388941. The reversal of 68388936 is 63988386.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41700 + ... + 43308.

It is an arithmetic number, because the mean of its divisors is an integer number (1738800).

Almost surely, 2^68388936 is an apocalyptic number.

68388936 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68388936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111283200).

68388936 is an abundant number, since it is smaller than the sum of its proper divisors (154177464).

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

68388936 is a wasteful number, since it uses less digits than its factorization.

68388936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1655 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 51.

The square root of 68388936 is about 8269.7603351004. The cubic root of 68388936 is about 408.9422187888.

The spelling of 68388936 in words is "sixty-eight million, three hundred eighty-eight thousand, nine hundred thirty-six".