51747828 has 72 divisors (see below), whose sum is σ = 134153376. Its totient is φ = 15512640.

The previous prime is 51747827. The next prime is 51747869. The reversal of 51747828 is 82874715.

It is a self number, because there is not a number n which added to its sum of digits gives 51747828.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51747823) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227851 + ... + 228077.

Almost surely, 2^51747828 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 51747828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67076688).

51747828 is an abundant number, since it is smaller than the sum of its proper divisors (82405548).

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

51747828 is a wasteful number, since it uses less digits than its factorization.

51747828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413 (or 400 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 51747828 is about 7193.5963189492. The cubic root of 51747828 is about 372.6467820857.

The spelling of 51747828 in words is "fifty-one million, seven hundred forty-seven thousand, eight hundred twenty-eight".