51658860 has 96 divisors (see below), whose sum is σ = 163296000. Its totient is φ = 12087040.

The previous prime is 51658829. The next prime is 51658861. The reversal of 51658860 is 6885615.

It is not an unprimeable number, because it can be changed into a prime (51658861) 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, 17791 + ... + 20489.

It is an arithmetic number, because the mean of its divisors is an integer number (1701000).

Almost surely, 2^51658860 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 51658860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81648000).

51658860 is an abundant number, since it is smaller than the sum of its proper divisors (111637140).

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

51658860 is a wasteful number, since it uses less digits than its factorization.

51658860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2751 (or 2749 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 51658860 is about 7187.4098255213. The cubic root of 51658860 is about 372.4331006084.

The spelling of 51658860 in words is "fifty-one million, six hundred fifty-eight thousand, eight hundred sixty".