165728924 has 18 divisors (see below), whose sum is σ = 291618600. Its totient is φ = 82411576.

The previous prime is 165728921. The next prime is 165728951. The reversal of 165728924 is 429827561.

165728924 = T₄₂₄ + T₄₂₅ + ... + T₁₀₂₂.

It is a happy number.

Its product of digits (241920) is a multiple of the sum of its prime divisors (864).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165728921) 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 5 ways as a sum of consecutive naturals, for example, 276377 + ... + 276975.

Almost surely, 2^165728924 is an apocalyptic number.

It is an amenable number.

165728924 is a deficient number, since it is larger than the sum of its proper divisors (125889676).

165728924 is an equidigital number, since it uses as much as digits as its factorization.

165728924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129 (or 864 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 165728924 is about 12873.5746395475. The cubic root of 165728924 is about 549.2871469964.

The spelling of 165728924 in words is "one hundred sixty-five million, seven hundred twenty-eight thousand, nine hundred twenty-four".