63441540 has 72 divisors (see below), whose sum is σ = 196560000. Its totient is φ = 16555584.

The previous prime is 63441533. The next prime is 63441541. The reversal of 63441540 is 4514436.

It is not an unprimeable number, because it can be changed into a prime (63441541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4711 + ... + 12209.

It is an arithmetic number, because the mean of its divisors is an integer number (2730000).

Almost surely, 2^63441540 is an apocalyptic number.

63441540 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 63441540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98280000).

63441540 is an abundant number, since it is smaller than the sum of its proper divisors (133118460).

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

63441540 is a wasteful number, since it uses less digits than its factorization.

63441540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7561 (or 7556 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 63441540 is about 7965.0197739868. The cubic root of 63441540 is about 398.8331410772.

Adding to 63441540 its reverse (4514436), we get a palindrome (67955976).

The spelling of 63441540 in words is "sixty-three million, four hundred forty-one thousand, five hundred forty".