63921060 has 144 divisors (see below), whose sum is σ = 224305536. Its totient is φ = 14432256.

The previous prime is 63921029. The next prime is 63921083. The reversal of 63921060 is 6012936.

It is a happy number.

63921060 is a `hidden beast` number, since 639 + 21 + 0 + 6 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 121959 + ... + 122481.

Almost surely, 2^63921060 is an apocalyptic number.

63921060 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 63921060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112152768).

63921060 is an abundant number, since it is smaller than the sum of its proper divisors (160384476).

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

63921060 is a wasteful number, since it uses less digits than its factorization.

63921060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 637 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 63921060 is about 7995.0647276930. The cubic root of 63921060 is about 399.8354740039.

Adding to 63921060 its reverse (6012936), we get a palindrome (69933996).

The spelling of 63921060 in words is "sixty-three million, nine hundred twenty-one thousand, sixty".