63381912 has 64 divisors (see below), whose sum is σ = 173577600. Its totient is φ = 19127040.

The previous prime is 63381911. The next prime is 63381943. The reversal of 63381912 is 21918336.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63381911) 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, 107683 + ... + 108269.

It is an arithmetic number, because the mean of its divisors is an integer number (2712150).

Almost surely, 2^63381912 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 63381912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86788800).

63381912 is an abundant number, since it is smaller than the sum of its proper divisors (110195688).

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

63381912 is a wasteful number, since it uses less digits than its factorization.

63381912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016 (or 1012 counting only the distinct ones).

The product of its digits is 7776, while the sum is 33.

The square root of 63381912 is about 7961.2757771603. The cubic root of 63381912 is about 398.7081489604.

The spelling of 63381912 in words is "sixty-three million, three hundred eighty-one thousand, nine hundred twelve".