50821840 has 40 divisors (see below), whose sum is σ = 125114760. Its totient is φ = 19132416.

The previous prime is 50821817. The next prime is 50821867. The reversal of 50821840 is 4812805.

50821840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17505856 + 33315984 = 4184^2 + 5772^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 50821799 and 50821808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17325 + ... + 20044.

It is an arithmetic number, because the mean of its divisors is an integer number (3127869).

Almost surely, 2^50821840 is an apocalyptic number.

It is an amenable number.

50821840 is an abundant number, since it is smaller than the sum of its proper divisors (74292920).

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

50821840 is a wasteful number, since it uses less digits than its factorization.

50821840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37399 (or 37393 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 50821840 is about 7128.9438207914. The cubic root of 50821840 is about 370.4106470668.

The spelling of 50821840 in words is "fifty million, eight hundred twenty-one thousand, eight hundred forty".