163479820 has 96 divisors (see below), whose sum is σ = 419126400. Its totient is φ = 52285440.

The previous prime is 163479809. The next prime is 163479829. The reversal of 163479820 is 28974361.

It is not an unprimeable number, because it can be changed into a prime (163479829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354390 + ... + 354850.

It is an arithmetic number, because the mean of its divisors is an integer number (4365900).

Almost surely, 2^163479820 is an apocalyptic number.

163479820 is a gapful number since it is divisible by the number (10) 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 163479820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209563200).

163479820 is an abundant number, since it is smaller than the sum of its proper divisors (255646580).

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

163479820 is a wasteful number, since it uses less digits than its factorization.

163479820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 163479820 is about 12785.9227277502. The cubic root of 163479820 is about 546.7910327464.

The spelling of 163479820 in words is "one hundred sixty-three million, four hundred seventy-nine thousand, eight hundred twenty".