63688988 has 96 divisors (see below), whose sum is σ = 137894400. Its totient is φ = 25401600.

The previous prime is 63688981. The next prime is 63689009. The reversal of 63688988 is 88988636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63688981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 896993 + ... + 897063.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^63688988 is an apocalyptic number.

It is an amenable number.

63688988 is an abundant number, since it is smaller than the sum of its proper divisors (74205412).

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

63688988 is a wasteful number, since it uses less digits than its factorization.

63688988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 169 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 56.

The square root of 63688988 is about 7980.5380770973. The cubic root of 63688988 is about 399.3510059195.

The spelling of 63688988 in words is "sixty-three million, six hundred eighty-eight thousand, nine hundred eighty-eight".