163088820 has 144 divisors (see below), whose sum is σ = 528353280. Its totient is φ = 40578048.

The previous prime is 163088801. The next prime is 163088833. The reversal of 163088820 is 28880361.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 47 ways as a sum of consecutive naturals, for example, 682261 + ... + 682499.

It is an arithmetic number, because the mean of its divisors is an integer number (3669120).

Almost surely, 2^163088820 is an apocalyptic number.

163088820 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 163088820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264176640).

163088820 is an abundant number, since it is smaller than the sum of its proper divisors (365264460).

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

163088820 is a wasteful number, since it uses less digits than its factorization.

163088820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 163088820 is about 12770.6233207311. The cubic root of 163088820 is about 546.3547587816.

The spelling of 163088820 in words is "one hundred sixty-three million, eighty-eight thousand, eight hundred twenty".