163319988 has 48 divisors (see below), whose sum is σ = 412917120. Its totient is φ = 49943424.

The previous prime is 163319983. The next prime is 163319999. The reversal of 163319988 is 889913361.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163319983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22918 + ... + 29186.

It is an arithmetic number, because the mean of its divisors is an integer number (8602440).

Almost surely, 2^163319988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163319988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206458560).

163319988 is an abundant number, since it is smaller than the sum of its proper divisors (249597132).

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

163319988 is a wasteful number, since it uses less digits than its factorization.

163319988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6456 (or 6454 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 163319988 is about 12779.6708877811. The cubic root of 163319988 is about 546.6127779189.

The spelling of 163319988 in words is "one hundred sixty-three million, three hundred nineteen thousand, nine hundred eighty-eight".