63867880 has 16 divisors (see below), whose sum is σ = 143702820. Its totient is φ = 25547136.

The previous prime is 63867833. The next prime is 63867887. The reversal of 63867880 is 8876836.

It can be written as a sum of positive squares in 2 ways, for example, as 51236964 + 12630916 = 7158^2 + 3554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63867880.

It is not an unprimeable number, because it can be changed into a prime (63867887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 798309 + ... + 798388.

Almost surely, 2^63867880 is an apocalyptic number.

It is an amenable number.

63867880 is an abundant number, since it is smaller than the sum of its proper divisors (79834940).

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

63867880 is a wasteful number, since it uses less digits than its factorization.

63867880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596708 (or 1596704 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 63867880 is about 7991.7382339514. The cubic root of 63867880 is about 399.7245603761.

The spelling of 63867880 in words is "sixty-three million, eight hundred sixty-seven thousand, eight hundred eighty".