50857220 has 48 divisors (see below), whose sum is σ = 110602800. Its totient is φ = 19630080.

The previous prime is 50857211. The next prime is 50857223. The reversal of 50857220 is 2275805.

It can be written as a sum of positive squares in 8 ways, for example, as 9048064 + 41809156 = 3008^2 + 6466^2 .

It is a super-2 number, since 2×50857220² = 5172913652256800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (50857223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89096 + ... + 89664.

It is an arithmetic number, because the mean of its divisors is an integer number (2304225).

Almost surely, 2^50857220 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 50857220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55301400).

50857220 is an abundant number, since it is smaller than the sum of its proper divisors (59745580).

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

50857220 is a wasteful number, since it uses less digits than its factorization.

50857220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728 (or 726 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 50857220 is about 7131.4248225723. The cubic root of 50857220 is about 370.4965818328.

The spelling of 50857220 in words is "fifty million, eight hundred fifty-seven thousand, two hundred twenty".