63988578 has 48 divisors (see below), whose sum is σ = 148711680. Its totient is φ = 19813248.

The previous prime is 63988567. The next prime is 63988579. The reversal of 63988578 is 87588936.

It is a happy number.

63988578 is a `hidden beast` number, since 63 + 9 + 8 + 8 + 578 = 666.

It is a super-2 number, since 2×63988578² = 8189076228924168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (63988579) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22851 + ... + 25497.

It is an arithmetic number, because the mean of its divisors is an integer number (3098160).

Almost surely, 2^63988578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63988578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74355840).

63988578 is an abundant number, since it is smaller than the sum of its proper divisors (84723102).

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

63988578 is a wasteful number, since it uses less digits than its factorization.

63988578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2748 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 63988578 is about 7999.2860931461. The cubic root of 63988578 is about 399.9762027509.

The spelling of 63988578 in words is "sixty-three million, nine hundred eighty-eight thousand, five hundred seventy-eight".