63961884 has 72 divisors (see below), whose sum is σ = 188304480. Its totient is φ = 17926272.

The previous prime is 63961883. The next prime is 63961901. The reversal of 63961884 is 48816936.

63961884 is a `hidden beast` number, since 639 + 6 + 1 + 8 + 8 + 4 = 666.

It is a super-2 number, since 2×63961884² = 8182245209658912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63961883) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10962 + ... + 15750.

It is an arithmetic number, because the mean of its divisors is an integer number (2615340).

Almost surely, 2^63961884 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 63961884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94152240).

63961884 is an abundant number, since it is smaller than the sum of its proper divisors (124342596).

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

63961884 is a wasteful number, since it uses less digits than its factorization.

63961884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4859 (or 4854 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 63961884 is about 7997.6173951996. The cubic root of 63961884 is about 399.9205758972.

The spelling of 63961884 in words is "sixty-three million, nine hundred sixty-one thousand, eight hundred eighty-four".