63888189 has 8 divisors (see below), whose sum is σ = 88121760. Its totient is φ = 41123376.

The previous prime is 63888137. The next prime is 63888191. The reversal of 63888189 is 98188836.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63888189 - 2¹⁷ = 63757117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63888199) 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, 367087 + ... + 367260.

It is an arithmetic number, because the mean of its divisors is an integer number (11015220).

Almost surely, 2^63888189 is an apocalyptic number.

It is an amenable number.

63888189 is a deficient number, since it is larger than the sum of its proper divisors (24233571).

63888189 is a wasteful number, since it uses less digits than its factorization.

63888189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734379.

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

The square root of 63888189 is about 7993.0087576582. The cubic root of 63888189 is about 399.7669246327.

The spelling of 63888189 in words is "sixty-three million, eight hundred eighty-eight thousand, one hundred eighty-nine".