63909888 has 104 divisors (see below), whose sum is σ = 195011328. Its totient is φ = 18235392.

The previous prime is 63909887. The next prime is 63909889. The reversal of 63909888 is 88890936.

It is an interprime number because it is at equal distance from previous prime (63909887) and next prime (63909889).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 63909888.

It is not an unprimeable number, because it can be changed into a prime (63909887) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85645 + ... + 86387.

Almost surely, 2^63909888 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 63909888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97505664).

63909888 is an abundant number, since it is smaller than the sum of its proper divisors (131101440).

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

63909888 is an equidigital number, since it uses as much as digits as its factorization.

63909888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777 (or 755 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 63909888 is about 7994.3660161391. The cubic root of 63909888 is about 399.8121784882.

The spelling of 63909888 in words is "sixty-three million, nine hundred nine thousand, eight hundred eighty-eight".