161827908 has 96 divisors (see below), whose sum is σ = 433907712. Its totient is φ = 46464000.

The previous prime is 161827901. The next prime is 161827949. The reversal of 161827908 is 809728161.

It is a self number, because there is not a number n which added to its sum of digits gives 161827908.

It is not an unprimeable number, because it can be changed into a prime (161827901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 458260 + ... + 458612.

It is an arithmetic number, because the mean of its divisors is an integer number (4519872).

Almost surely, 2^161827908 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 161827908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216953856).

161827908 is an abundant number, since it is smaller than the sum of its proper divisors (272079804).

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

161827908 is a wasteful number, since it uses less digits than its factorization.

161827908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 42.

The square root of 161827908 is about 12721.1598527807. The cubic root of 161827908 is about 544.9430774093.

It can be divided in two parts, 161827 and 908, that added together give a triangular number (162735 = T₅₇₀).

The spelling of 161827908 in words is "one hundred sixty-one million, eight hundred twenty-seven thousand, nine hundred eight".