165990392 has 16 divisors (see below), whose sum is σ = 311375400. Its totient is φ = 82956960.

The previous prime is 165990373. The next prime is 165990401. The reversal of 165990392 is 293099561.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23534 + ... + 29762.

Almost surely, 2^165990392 is an apocalyptic number.

It is an amenable number.

165990392 is a deficient number, since it is larger than the sum of its proper divisors (145385008).

165990392 is a wasteful number, since it uses less digits than its factorization.

165990392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9566 (or 9562 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 165990392 is about 12883.7258586171. The cubic root of 165990392 is about 549.5758625383.

The spelling of 165990392 in words is "one hundred sixty-five million, nine hundred ninety thousand, three hundred ninety-two".