63105280 has 72 divisors (see below), whose sum is σ = 172775232. Its totient is φ = 21633024.

The previous prime is 63105269. The next prime is 63105323. The reversal of 63105280 is 8250136.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5439 + ... + 12481.

It is an arithmetic number, because the mean of its divisors is an integer number (2399656).

Almost surely, 2^63105280 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 63105280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86387616).

63105280 is an abundant number, since it is smaller than the sum of its proper divisors (109669952).

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

63105280 is an equidigital number, since it uses as much as digits as its factorization.

63105280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7071 (or 7057 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 63105280 is about 7943.8831814170. The cubic root of 63105280 is about 398.1272456616.

The spelling of 63105280 in words is "sixty-three million, one hundred five thousand, two hundred eighty".