50509440 has 256 divisors, whose sum is σ = 186048000. Its totient is φ = 12939264.

The previous prime is 50509427. The next prime is 50509441. The reversal of 50509440 is 4490505.

It is a super-2 number, since 2×50509440² = 5102407058227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (50509441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 639321 + ... + 639399.

It is an arithmetic number, because the mean of its divisors is an integer number (726750).

Almost surely, 2^50509440 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 50509440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93024000).

50509440 is an abundant number, since it is smaller than the sum of its proper divisors (135538560).

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

50509440 is a wasteful number, since it uses less digits than its factorization.

50509440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 50509440 is about 7106.9993668214. Note that the first 3 decimals coincide. The cubic root of 50509440 is about 369.6501197001.

Adding to 50509440 its reverse (4490505), we get a palindrome (54999945).

The spelling of 50509440 in words is "fifty million, five hundred nine thousand, four hundred forty".