50387220 has 144 divisors (see below), whose sum is σ = 167770512. Its totient is φ = 12165120.

The previous prime is 50387213. The next prime is 50387231. The reversal of 50387220 is 2278305.

It can be written as a sum of positive squares in 8 ways, for example, as 16793604 + 33593616 = 4098^2 + 5796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 142564 + ... + 142916.

It is an arithmetic number, because the mean of its divisors is an integer number (1165073).

Almost surely, 2^50387220 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 50387220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83885256).

50387220 is an abundant number, since it is smaller than the sum of its proper divisors (117383292).

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

50387220 is a wasteful number, since it uses less digits than its factorization.

50387220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 437 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 50387220 is about 7098.3955933718. The cubic root of 50387220 is about 369.3517257961.

The spelling of 50387220 in words is "fifty million, three hundred eighty-seven thousand, two hundred twenty".