165234340 has 36 divisors (see below), whose sum is σ = 358588188. Its totient is φ = 63954240.

The previous prime is 165234331. The next prime is 165234347. The reversal of 165234340 is 43432561.

It can be written as a sum of positive squares in 2 ways, for example, as 88811776 + 76422564 = 9424^2 + 8742^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165234299 and 165234308.

It is not an unprimeable number, because it can be changed into a prime (165234347) 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 11 ways as a sum of consecutive naturals, for example, 14922 + ... + 23518.

It is an arithmetic number, because the mean of its divisors is an integer number (9960783).

Almost surely, 2^165234340 is an apocalyptic number.

165234340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165234340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179294094).

165234340 is an abundant number, since it is smaller than the sum of its proper divisors (193353848).

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

165234340 is a wasteful number, since it uses less digits than its factorization.

165234340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8668 (or 8635 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 165234340 is about 12854.3510143453. The cubic root of 165234340 is about 548.7401909126.

The spelling of 165234340 in words is "one hundred sixty-five million, two hundred thirty-four thousand, three hundred forty".