63689976 has 160 divisors (see below), whose sum is σ = 214896000. Its totient is φ = 17216064.

The previous prime is 63689971. The next prime is 63690017. The reversal of 63689976 is 67998636.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63689971) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 85815 + ... + 86553.

It is an arithmetic number, because the mean of its divisors is an integer number (1343100).

Almost surely, 2^63689976 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 63689976, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107448000).

63689976 is an abundant number, since it is smaller than the sum of its proper divisors (151206024).

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

63689976 is a wasteful number, since it uses less digits than its factorization.

63689976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 770 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 54.

The square root of 63689976 is about 7980.5999774453. The cubic root of 63689976 is about 399.3530709377.

The spelling of 63689976 in words is "sixty-three million, six hundred eighty-nine thousand, nine hundred seventy-six".