63989028 has 60 divisors (see below), whose sum is σ = 171395532. Its totient is φ = 20805120.

The previous prime is 63988997. The next prime is 63989033. The reversal of 63989028 is 82098936.

63989028 is a `hidden beast` number, since 639 + 8 + 9 + 0 + 2 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4359744 + 59629284 = 2088^2 + 7722^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10876 + ... + 15692.

Almost surely, 2^63989028 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 63989028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85697766).

63989028 is an abundant number, since it is smaller than the sum of its proper divisors (107406504).

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

63989028 is a wasteful number, since it uses less digits than its factorization.

63989028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4874 (or 4863 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 63989028 is about 7999.3142206067. The cubic root of 63989028 is about 399.9771403603.

The spelling of 63989028 in words is "sixty-three million, nine hundred eighty-nine thousand, twenty-eight".