161904306 has 8 divisors (see below), whose sum is σ = 323808624. Its totient is φ = 53968100.

The previous prime is 161904293. The next prime is 161904359. The reversal of 161904306 is 603409161.

It is a sphenic number, since it is the product of 3 distinct primes.

161904306 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13492020 + ... + 13492031.

It is an arithmetic number, because the mean of its divisors is an integer number (40476078).

Almost surely, 2^161904306 is an apocalyptic number.

161904306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161904306 is a wasteful number, since it uses less digits than its factorization.

161904306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26984056.

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 161904306 is about 12724.1622906972. The cubic root of 161904306 is about 545.0288187213.

The spelling of 161904306 in words is "one hundred sixty-one million, nine hundred four thousand, three hundred six".