161847210 has 64 divisors (see below), whose sum is σ = 450588672. Its totient is φ = 36438336.

The previous prime is 161847193. The next prime is 161847211. The reversal of 161847210 is 12748161.

161847210 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (161847211) 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, 8319 + ... + 19821.

It is an arithmetic number, because the mean of its divisors is an integer number (7040448).

Almost surely, 2^161847210 is an apocalyptic number.

161847210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 161847210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225294336).

161847210 is an abundant number, since it is smaller than the sum of its proper divisors (288741462).

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

161847210 is a wasteful number, since it uses less digits than its factorization.

161847210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11587.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 161847210 is about 12721.9184873980. The cubic root of 161847210 is about 544.9647425498.

It can be divided in two parts, 1618 and 47210, that added together give a triangular number (48828 = T₃₁₂).

The spelling of 161847210 in words is "one hundred sixty-one million, eight hundred forty-seven thousand, two hundred ten".