63503440 has 240 divisors, whose sum is σ = 202594176. Its totient is φ = 17971200.

The previous prime is 63503431. The next prime is 63503441. The reversal of 63503440 is 4430536.

63503440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63503441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1041010 + ... + 1041070.

Almost surely, 2^63503440 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 63503440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101297088).

63503440 is an abundant number, since it is smaller than the sum of its proper divisors (139090736).

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

63503440 is a wasteful number, since it uses less digits than its factorization.

63503440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118 (or 99 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 63503440 is about 7968.9045671284. The cubic root of 63503440 is about 398.9628129320.

Adding to 63503440 its reverse (4430536), we get a palindrome (67933976).

The spelling of 63503440 in words is "sixty-three million, five hundred three thousand, four hundred forty".