1609331172 has 24 divisors (see below), whose sum is σ = 3792288192. Its totient is φ = 531132000.

The previous prime is 1609331161. The next prime is 1609331189. The reversal of 1609331172 is 2711339061.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662704 + ... + 665127.

It is an arithmetic number, because the mean of its divisors is an integer number (158012008).

Almost surely, 2^1609331172 is an apocalyptic number.

1609331172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1609331172 is an abundant number, since it is smaller than the sum of its proper divisors (2182957020).

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

1609331172 is a wasteful number, since it uses less digits than its factorization.

1609331172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1327939 (or 1327937 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 1609331172 is about 40116.4700839942. The cubic root of 1609331172 is about 1171.8763988435.

The spelling of 1609331172 in words is "one billion, six hundred nine million, three hundred thirty-one thousand, one hundred seventy-two".