161592320 has 88 divisors (see below), whose sum is σ = 398575464. Its totient is φ = 62816256.

The previous prime is 161592311. The next prime is 161592331. The reversal of 161592320 is 23295161.

It can be written as a sum of positive squares in 4 ways, for example, as 12166144 + 149426176 = 3488^2 + 12224^2 .

It is a super-2 number, since 2×161592320² = 52224155765964800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189014 + ... + 189866.

Almost surely, 2^161592320 is an apocalyptic number.

161592320 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 161592320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199287732).

161592320 is an abundant number, since it is smaller than the sum of its proper divisors (236983144).

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

161592320 is an equidigital number, since it uses as much as digits as its factorization.

161592320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 915 (or 897 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 161592320 is about 12711.8967900152. The cubic root of 161592320 is about 544.6785074700.

The spelling of 161592320 in words is "one hundred sixty-one million, five hundred ninety-two thousand, three hundred twenty".