163887128 has 8 divisors (see below), whose sum is σ = 307288380. Its totient is φ = 81943560.

The previous prime is 163887109. The next prime is 163887137. The reversal of 163887128 is 821788361.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10242938 + ... + 10242953.

Almost surely, 2^163887128 is an apocalyptic number.

It is an amenable number.

163887128 is a deficient number, since it is larger than the sum of its proper divisors (143401252).

163887128 is a wasteful number, since it uses less digits than its factorization.

163887128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20485897 (or 20485893 counting only the distinct ones).

The product of its digits is 129024, while the sum is 44.

The square root of 163887128 is about 12801.8408051342. The cubic root of 163887128 is about 547.2447638875.

The spelling of 163887128 in words is "one hundred sixty-three million, eight hundred eighty-seven thousand, one hundred twenty-eight".