63216440 has 64 divisors (see below), whose sum is σ = 167823360. Its totient is φ = 20972160.

The previous prime is 63216371. The next prime is 63216451. The reversal of 63216440 is 4461236.

63216440 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5039 + ... + 12321.

It is an arithmetic number, because the mean of its divisors is an integer number (2622240).

Almost surely, 2^63216440 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 63216440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83911680).

63216440 is an abundant number, since it is smaller than the sum of its proper divisors (104606920).

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

63216440 is a wasteful number, since it uses less digits than its factorization.

63216440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7332 (or 7328 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 63216440 is about 7950.8766812220. The cubic root of 63216440 is about 398.3608756868.

Adding to 63216440 its reverse (4461236), we get a palindrome (67677676).

The spelling of 63216440 in words is "sixty-three million, two hundred sixteen thousand, four hundred forty".