51686360 has 96 divisors (see below), whose sum is σ = 130712400. Its totient is φ = 18374400.

The previous prime is 51686357. The next prime is 51686389. The reversal of 51686360 is 6368615.

51686360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51686360.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 285470 + ... + 285650.

Almost surely, 2^51686360 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 51686360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65356200).

51686360 is an abundant number, since it is smaller than the sum of its proper divisors (79026040).

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

51686360 is a wasteful number, since it uses less digits than its factorization.

51686360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 51686360 is about 7189.3226384688. The cubic root of 51686360 is about 372.4991757110.

The spelling of 51686360 in words is "fifty-one million, six hundred eighty-six thousand, three hundred sixty".