165430840 has 16 divisors (see below), whose sum is σ = 372219480. Its totient is φ = 66172320.

The previous prime is 165430831. The next prime is 165430843. The reversal of 165430840 is 48034561.

It is a happy number.

It is a super-3 number, since 3×165430840³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165430843) 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 3 ways as a sum of consecutive naturals, for example, 2067846 + ... + 2067925.

Almost surely, 2^165430840 is an apocalyptic number.

165430840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165430840 is an abundant number, since it is smaller than the sum of its proper divisors (206788640).

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

165430840 is a wasteful number, since it uses less digits than its factorization.

165430840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135782 (or 4135778 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 165430840 is about 12861.9920696601. The cubic root of 165430840 is about 548.9576290316.

The spelling of 165430840 in words is "one hundred sixty-five million, four hundred thirty thousand, eight hundred forty".