63889818 has 16 divisors (see below), whose sum is σ = 134505120. Its totient is φ = 20175696.

The previous prime is 63889817. The next prime is 63889829. The reversal of 63889818 is 81898836.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (63889811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280105 + ... + 280332.

It is an arithmetic number, because the mean of its divisors is an integer number (8406570).

Almost surely, 2^63889818 is an apocalyptic number.

63889818 is an abundant number, since it is smaller than the sum of its proper divisors (70615302).

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

63889818 is a wasteful number, since it uses less digits than its factorization.

63889818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560461.

The product of its digits is 663552, while the sum is 51.

The square root of 63889818 is about 7993.1106585609. The cubic root of 63889818 is about 399.7703223123.

The spelling of 63889818 in words is "sixty-three million, eight hundred eighty-nine thousand, eight hundred eighteen".