161089320 has 64 divisors (see below), whose sum is σ = 552309120. Its totient is φ = 36820224.

The previous prime is 161089303. The next prime is 161089339. The reversal of 161089320 is 23980161.

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

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95047 + ... + 96726.

It is an arithmetic number, because the mean of its divisors is an integer number (8629830).

Almost surely, 2^161089320 is an apocalyptic number.

161089320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161089320 is an abundant number, since it is smaller than the sum of its proper divisors (391219800).

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

161089320 is a wasteful number, since it uses less digits than its factorization.

161089320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191794 (or 191790 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 161089320 is about 12692.0967534919. The cubic root of 161089320 is about 544.1127667756.

The spelling of 161089320 in words is "one hundred sixty-one million, eighty-nine thousand, three hundred twenty".