161210784 has 144 divisors (see below), whose sum is σ = 504348768. Its totient is φ = 44932608.

The previous prime is 161210783. The next prime is 161210821. The reversal of 161210784 is 487012161.

It is not an unprimeable number, because it can be changed into a prime (161210783) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 201874 + ... + 202670.

It is an arithmetic number, because the mean of its divisors is an integer number (3502422).

Almost surely, 2^161210784 is an apocalyptic number.

161210784 is a gapful number since it is divisible by the number (14) 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 161210784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252174384).

161210784 is an abundant number, since it is smaller than the sum of its proper divisors (343137984).

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

161210784 is a wasteful number, since it uses less digits than its factorization.

161210784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 852 counting only the distinct ones).

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

The square root of 161210784 is about 12696.8808768138. The cubic root of 161210784 is about 544.2494890798.

The spelling of 161210784 in words is "one hundred sixty-one million, two hundred ten thousand, seven hundred eighty-four".