63520240 has 80 divisors (see below), whose sum is σ = 174274560. Its totient is φ = 21070080.

The previous prime is 63520217. The next prime is 63520241. The reversal of 63520240 is 4202536.

It is a happy number.

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 (63520241) 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, 15531 + ... + 19189.

It is an arithmetic number, because the mean of its divisors is an integer number (2178432).

Almost surely, 2^63520240 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 63520240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87137280).

63520240 is an abundant number, since it is smaller than the sum of its proper divisors (110754320).

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

63520240 is a wasteful number, since it uses less digits than its factorization.

63520240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3710 (or 3704 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 63520240 is about 7969.9585946227. The cubic root of 63520240 is about 398.9979920461.

Adding to 63520240 its reverse (4202536), we get a palindrome (67722776).

The spelling of 63520240 in words is "sixty-three million, five hundred twenty thousand, two hundred forty".