51802128 has 120 divisors (see below), whose sum is σ = 175488768. Its totient is φ = 13925376.

The previous prime is 51802123. The next prime is 51802139. The reversal of 51802128 is 82120815.

It is not an unprimeable number, because it can be changed into a prime (51802123) 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, 15625 + ... + 18647.

Almost surely, 2^51802128 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 51802128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87744384).

51802128 is an abundant number, since it is smaller than the sum of its proper divisors (123686640).

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

51802128 is a wasteful number, since it uses less digits than its factorization.

51802128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061 (or 3052 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 27.

The square root of 51802128 is about 7197.3695194842. The cubic root of 51802128 is about 372.7770783552. Note that the first 3 decimals are identical.

The spelling of 51802128 in words is "fifty-one million, eight hundred two thousand, one hundred twenty-eight".