63961880 has 16 divisors (see below), whose sum is σ = 143914320. Its totient is φ = 25584736.

The previous prime is 63961853. The next prime is 63961883. The reversal of 63961880 is 8816936.

It is a happy number.

It is a super-2 number, since 2×63961880² = 8182244186268800, 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799484 + ... + 799563.

It is an arithmetic number, because the mean of its divisors is an integer number (8994645).

Almost surely, 2^63961880 is an apocalyptic number.

It is an amenable number.

63961880 is an abundant number, since it is smaller than the sum of its proper divisors (79952440).

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

63961880 is a wasteful number, since it uses less digits than its factorization.

63961880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599058 (or 1599054 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 63961880 is about 7997.6171451252. The cubic root of 63961880 is about 399.9205675606.

The spelling of 63961880 in words is "sixty-three million, nine hundred sixty-one thousand, eight hundred eighty".