63781900 has 144 divisors (see below), whose sum is σ = 175377664. Its totient is φ = 19595520.

The previous prime is 63781877. The next prime is 63781987. The reversal of 63781900 is 918736.

63781900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×63781900² = 8136261535220000, which contains 22 as substring.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 391219 + ... + 391381.

Almost surely, 2^63781900 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 63781900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87688832).

63781900 is an abundant number, since it is smaller than the sum of its proper divisors (111595764).

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

63781900 is a wasteful number, since it uses less digits than its factorization.

63781900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240 (or 233 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 63781900 is about 7986.3571169839. The cubic root of 63781900 is about 399.5451078790.

The spelling of 63781900 in words is "sixty-three million, seven hundred eighty-one thousand, nine hundred".