63440880 has 80 divisors (see below), whose sum is σ = 203034624. Its totient is φ = 16369920.

The previous prime is 63440879. The next prime is 63440887. The reversal of 63440880 is 8804436.

63440880 = 331² + 332² + ... + 609².

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63440887) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3177 + ... + 11703.

Almost surely, 2^63440880 is an apocalyptic number.

63440880 is a gapful number since it is divisible by the number (60) 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 63440880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101517312).

63440880 is an abundant number, since it is smaller than the sum of its proper divisors (139593744).

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

63440880 is a wasteful number, since it uses less digits than its factorization.

63440880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8574 (or 8568 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 63440880 is about 7964.9783427201. The cubic root of 63440880 is about 398.8317580150.

It can be divided in two parts, 634 and 40880, that added together give a palindrome (41514).

The spelling of 63440880 in words is "sixty-three million, four hundred forty thousand, eight hundred eighty".