63680408 has 32 divisors (see below), whose sum is σ = 131492160. Its totient is φ = 28670880.

The previous prime is 63680389. The next prime is 63680423. The reversal of 63680408 is 80408636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6035 + ... + 12797.

It is an arithmetic number, because the mean of its divisors is an integer number (4109130).

Almost surely, 2^63680408 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 63680408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65746080).

63680408 is an abundant number, since it is smaller than the sum of its proper divisors (67811752).

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

63680408 is a wasteful number, since it uses less digits than its factorization.

63680408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6887 (or 6883 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 63680408 is about 7980.0005012531. Note that the first 3 decimals coincide. The cubic root of 63680408 is about 399.3330719688. Note that the first 3 decimals are identical.

The spelling of 63680408 in words is "sixty-three million, six hundred eighty thousand, four hundred eight".