51968868 has 96 divisors (see below), whose sum is σ = 148721664. Its totient is φ = 13799808.

The previous prime is 51968863. The next prime is 51968893. The reversal of 51968868 is 86886915.

It is a self number, because there is not a number n which added to its sum of digits gives 51968868.

It is not an unprimeable number, because it can be changed into a prime (51968863) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71121 + ... + 71847.

It is an arithmetic number, because the mean of its divisors is an integer number (1549184).

Almost surely, 2^51968868 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 51968868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74360832).

51968868 is an abundant number, since it is smaller than the sum of its proper divisors (96752796).

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

51968868 is a wasteful number, since it uses less digits than its factorization.

51968868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 799 counting only the distinct ones).

The product of its digits is 829440, while the sum is 51.

The square root of 51968868 is about 7208.9436119309. The cubic root of 51968868 is about 373.1766132878.

The spelling of 51968868 in words is "fifty-one million, nine hundred sixty-eight thousand, eight hundred sixty-eight".