63987400 has 24 divisors (see below), whose sum is σ = 148771170. Its totient is φ = 25594880.

The previous prime is 63987367. The next prime is 63987419. The reversal of 63987400 is 478936.

63987400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 31337604 + 32649796 = 5598^2 + 5714^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63987400.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 159769 + ... + 160168.

Almost surely, 2^63987400 is an apocalyptic number.

It is an amenable number.

63987400 is an abundant number, since it is smaller than the sum of its proper divisors (84783770).

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

63987400 is a wasteful number, since it uses less digits than its factorization.

63987400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319953 (or 319944 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 63987400 is about 7999.2124612364. The cubic root of 63987400 is about 399.9737482772.

The spelling of 63987400 in words is "sixty-three million, nine hundred eighty-seven thousand, four hundred".