68378520 has 192 divisors, whose sum is σ = 247471200. Its totient is φ = 15052800.

The previous prime is 68378509. The next prime is 68378521. The reversal of 68378520 is 2587386.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68378521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170320 + ... + 170720.

Almost surely, 2^68378520 is an apocalyptic number.

68378520 is a gapful number since it is divisible by the number (60) 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 68378520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (123735600).

68378520 is an abundant number, since it is smaller than the sum of its proper divisors (179092680).

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

68378520 is a wasteful number, since it uses less digits than its factorization.

68378520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 68378520 is about 8269.1305467987. The cubic root of 68378520 is about 408.9214563738.

The spelling of 68378520 in words is "sixty-eight million, three hundred seventy-eight thousand, five hundred twenty".