163881984 has 88 divisors (see below), whose sum is σ = 499271488. Its totient is φ = 46817280.

The previous prime is 163881967. The next prime is 163882001. The reversal of 163881984 is 489188361.

It is an interprime number because it is at equal distance from previous prime (163881967) and next prime (163882001).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17694 + ... + 25314.

Almost surely, 2^163881984 is an apocalyptic number.

163881984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163881984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249635744).

163881984 is an abundant number, since it is smaller than the sum of its proper divisors (335389504).

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

163881984 is an equidigital number, since it uses as much as digits as its factorization.

163881984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7651 (or 7633 counting only the distinct ones).

The product of its digits is 331776, while the sum is 48.

The square root of 163881984 is about 12801.6398949510. The cubic root of 163881984 is about 547.2390382873.

The spelling of 163881984 in words is "one hundred sixty-three million, eight hundred eighty-one thousand, nine hundred eighty-four".