50640320 has 56 divisors (see below), whose sum is σ = 126949200. Its totient is φ = 19187712.

The previous prime is 50640311. The next prime is 50640323. The reversal of 50640320 is 2304605.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 50640292 and 50640301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50640323) 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, 1916 + ... + 10244.

It is an arithmetic number, because the mean of its divisors is an integer number (2266950).

Almost surely, 2^50640320 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 50640320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63474600).

50640320 is an abundant number, since it is smaller than the sum of its proper divisors (76308880).

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

50640320 is a wasteful number, since it uses less digits than its factorization.

50640320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8365 (or 8355 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 50640320 is about 7116.2012338045. The cubic root of 50640320 is about 369.9691233060.

Adding to 50640320 its reverse (2304605), we get a palindrome (52944925).

The spelling of 50640320 in words is "fifty million, six hundred forty thousand, three hundred twenty".