63440384 has 80 divisors (see below), whose sum is σ = 149799936. Its totient is φ = 26265600.

The previous prime is 63440381. The next prime is 63440389. The reversal of 63440384 is 48304436.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 63440384.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63440381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110819 + ... + 111389.

Almost surely, 2^63440384 is an apocalyptic number.

63440384 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63440384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74899968).

63440384 is an abundant number, since it is smaller than the sum of its proper divisors (86359552).

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

63440384 is an equidigital number, since it uses as much as digits as its factorization.

63440384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 627 (or 611 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 63440384 is about 7964.9472063536. The cubic root of 63440384 is about 398.8307186165.

The spelling of 63440384 in words is "sixty-three million, four hundred forty thousand, three hundred eighty-four".