63440860 has 48 divisors (see below), whose sum is σ = 152925696. Its totient is φ = 21655872.

The previous prime is 63440809. The next prime is 63440863. The reversal of 63440860 is 6804436.

63440860 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 (63440863) 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 15 ways as a sum of consecutive naturals, for example, 35959 + ... + 37681.

It is an arithmetic number, because the mean of its divisors is an integer number (3185952).

Almost surely, 2^63440860 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 63440860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76462848).

63440860 is an abundant number, since it is smaller than the sum of its proper divisors (89484836).

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

63440860 is a wasteful number, since it uses less digits than its factorization.

63440860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2002 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 63440860 is about 7964.9770872238. The cubic root of 63440860 is about 398.8317161039.

The spelling of 63440860 in words is "sixty-three million, four hundred forty thousand, eight hundred sixty".