50809728 has 64 divisors (see below), whose sum is σ = 135717120. Its totient is φ = 16842240.

The previous prime is 50809723. The next prime is 50809729. The reversal of 50809728 is 82790805.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50809721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117673 + ... + 118103.

It is an arithmetic number, because the mean of its divisors is an integer number (2120580).

Almost surely, 2^50809728 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 50809728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67858560).

50809728 is an abundant number, since it is smaller than the sum of its proper divisors (84907392).

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

50809728 is a wasteful number, since it uses less digits than its factorization.

50809728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 50809728 is about 7128.0942754708. The cubic root of 50809728 is about 370.3812189691.

The spelling of 50809728 in words is "fifty million, eight hundred nine thousand, seven hundred twenty-eight".