161982828 has 216 divisors, whose sum is σ = 522849600. Its totient is φ = 43600032.

The previous prime is 161982827. The next prime is 161982853. The reversal of 161982828 is 828289161.

It is a happy number.

161982828 is a `hidden beast` number, since 1 + 619 + 8 + 2 + 8 + 28 = 666.

It is not an unprimeable number, because it can be changed into a prime (161982823) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 904843 + ... + 905021.

It is an arithmetic number, because the mean of its divisors is an integer number (2420600).

Almost surely, 2^161982828 is an apocalyptic number.

161982828 is a gapful number since it is divisible by the number (18) 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 161982828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261424800).

161982828 is an abundant number, since it is smaller than the sum of its proper divisors (360866772).

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

161982828 is a wasteful number, since it uses less digits than its factorization.

161982828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 210 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 161982828 is about 12727.2474636113. The cubic root of 161982828 is about 545.1169156907.

The spelling of 161982828 in words is "one hundred sixty-one million, nine hundred eighty-two thousand, eight hundred twenty-eight".