63901220 has 24 divisors (see below), whose sum is σ = 137820984. Its totient is φ = 24869376.

The previous prime is 63901213. The next prime is 63901223. The reversal of 63901220 is 2210936.

63901220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 34762816 + 29138404 = 5896^2 + 5398^2 .

It is not an unprimeable number, because it can be changed into a prime (63901223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42437 + ... + 43916.

It is an arithmetic number, because the mean of its divisors is an integer number (5742541).

Almost surely, 2^63901220 is an apocalyptic number.

It is an amenable number.

63901220 is an abundant number, since it is smaller than the sum of its proper divisors (73919764).

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

63901220 is a wasteful number, since it uses less digits than its factorization.

63901220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86399 (or 86397 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 63901220 is about 7993.8238659605. The cubic root of 63901220 is about 399.7941023669.

The spelling of 63901220 in words is "sixty-three million, nine hundred one thousand, two hundred twenty".