165435540 has 24 divisors (see below), whose sum is σ = 463219680. Its totient is φ = 44116128.

The previous prime is 165435539. The next prime is 165435553. The reversal of 165435540 is 45534561.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1378570 + ... + 1378689.

It is an arithmetic number, because the mean of its divisors is an integer number (19300820).

Almost surely, 2^165435540 is an apocalyptic number.

165435540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165435540 is an abundant number, since it is smaller than the sum of its proper divisors (297784140).

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

165435540 is a wasteful number, since it uses less digits than its factorization.

165435540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757271 (or 2757269 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 165435540 is about 12862.1747772295. The cubic root of 165435540 is about 548.9628277326.

The spelling of 165435540 in words is "one hundred sixty-five million, four hundred thirty-five thousand, five hundred forty".