50181440 has 28 divisors (see below), whose sum is σ = 119495316. Its totient is φ = 20072448.

The previous prime is 50181427. The next prime is 50181449. The reversal of 50181440 is 4418105.

It can be written as a sum of positive squares in 2 ways, for example, as 40043584 + 10137856 = 6328^2 + 3184^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50181449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78089 + ... + 78728.

Almost surely, 2^50181440 is an apocalyptic number.

It is an amenable number.

50181440 is an abundant number, since it is smaller than the sum of its proper divisors (69313876).

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

50181440 is a wasteful number, since it uses less digits than its factorization.

50181440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156834 (or 156824 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 50181440 is about 7083.8859392286. The cubic root of 50181440 is about 368.8482323757.

Adding to 50181440 its reverse (4418105), we get a palindrome (54599545).

The spelling of 50181440 in words is "fifty million, one hundred eighty-one thousand, four hundred forty".