63987456 has 216 divisors, whose sum is σ = 201988080. Its totient is φ = 17891328.

The previous prime is 63987433. The next prime is 63987457. The reversal of 63987456 is 65478936.

It is a Harshad number since it is a multiple of its sum of digits (48).

Its product of digits (1088640) is a multiple of the sum of its prime divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63987457) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 2206450 + ... + 2206478.

It is an arithmetic number, because the mean of its divisors is an integer number (935130).

Almost surely, 2^63987456 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 63987456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100994040).

63987456 is an abundant number, since it is smaller than the sum of its proper divisors (138000624).

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

63987456 is a wasteful number, since it uses less digits than its factorization.

63987456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 64 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 48.

The square root of 63987456 is about 7999.2159615802. The cubic root of 63987456 is about 399.9738649591.

The spelling of 63987456 in words is "sixty-three million, nine hundred eighty-seven thousand, four hundred fifty-six".