163989880 has 32 divisors (see below), whose sum is σ = 369825840. Its totient is φ = 65445120.

The previous prime is 163989857. The next prime is 163989911. The reversal of 163989880 is 88989361.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

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 7 ways as a sum of consecutive naturals, for example, 13795 + ... + 22765.

Almost surely, 2^163989880 is an apocalyptic number.

163989880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163989880 is an abundant number, since it is smaller than the sum of its proper divisors (205835960).

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

163989880 is a wasteful number, since it uses less digits than its factorization.

163989880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9439 (or 9435 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 163989880 is about 12805.8533491525. The cubic root of 163989880 is about 547.3591083293.

It can be divided in two parts, 1639 and 89880, that added together give a palindrome (91519).

The spelling of 163989880 in words is "one hundred sixty-three million, nine hundred eighty-nine thousand, eight hundred eighty".