161386032 has 80 divisors (see below), whose sum is σ = 460684800. Its totient is φ = 48423936.

The previous prime is 161386013. The next prime is 161386033. The reversal of 161386032 is 230683161.

It is not an unprimeable number, because it can be changed into a prime (161386033) 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 15 ways as a sum of consecutive naturals, for example, 14469 + ... + 23067.

It is an arithmetic number, because the mean of its divisors is an integer number (5758560).

Almost surely, 2^161386032 is an apocalyptic number.

161386032 is a gapful number since it is divisible by the number (12) 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 161386032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230342400).

161386032 is an abundant number, since it is smaller than the sum of its proper divisors (299298768).

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

161386032 is a wasteful number, since it uses less digits than its factorization.

161386032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8650 (or 8644 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 161386032 is about 12703.7802247992. The cubic root of 161386032 is about 544.4466307593.

The spelling of 161386032 in words is "one hundred sixty-one million, three hundred eighty-six thousand, thirty-two".