63897988 has 96 divisors (see below), whose sum is σ = 149990400. Its totient is φ = 23068800.

The previous prime is 63897959. The next prime is 63897989. The reversal of 63897988 is 88979836.

It is not an unprimeable number, because it can be changed into a prime (63897989) 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 31 ways as a sum of consecutive naturals, for example, 356883 + ... + 357061.

It is an arithmetic number, because the mean of its divisors is an integer number (1562400).

Almost surely, 2^63897988 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 63897988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74995200).

63897988 is an abundant number, since it is smaller than the sum of its proper divisors (86092412).

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

63897988 is a wasteful number, since it uses less digits than its factorization.

63897988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 279 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 58.

The square root of 63897988 is about 7993.6217073364. The cubic root of 63897988 is about 399.7873619827.

The spelling of 63897988 in words is "sixty-three million, eight hundred ninety-seven thousand, nine hundred eighty-eight".