51075728 has 40 divisors (see below), whose sum is σ = 111689280. Its totient is φ = 22413440.

The previous prime is 51075677. The next prime is 51075733. The reversal of 51075728 is 82757015.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 10107.

It is an arithmetic number, because the mean of its divisors is an integer number (2792232).

Almost surely, 2^51075728 is an apocalyptic number.

51075728 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51075728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55844640).

51075728 is an abundant number, since it is smaller than the sum of its proper divisors (60613552).

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

51075728 is a wasteful number, since it uses less digits than its factorization.

51075728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10055 (or 10049 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 35.

The square root of 51075728 is about 7146.7284823197. The cubic root of 51075728 is about 371.0264364594.

The spelling of 51075728 in words is "fifty-one million, seventy-five thousand, seven hundred twenty-eight".