165188740 has 24 divisors (see below), whose sum is σ = 350142912. Its totient is φ = 65457120.

The previous prime is 165188729. The next prime is 165188741. The reversal of 165188740 is 47881561.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 165188693 and 165188702.

It is not an unprimeable number, because it can be changed into a prime (165188741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36456 + ... + 40735.

It is an arithmetic number, because the mean of its divisors is an integer number (14589288).

Almost surely, 2^165188740 is an apocalyptic number.

165188740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165188740 is an abundant number, since it is smaller than the sum of its proper divisors (184954172).

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

165188740 is a wasteful number, since it uses less digits than its factorization.

165188740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77307 (or 77305 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 165188740 is about 12852.5771734699. The cubic root of 165188740 is about 548.6897073491.

The spelling of 165188740 in words is "one hundred sixty-five million, one hundred eighty-eight thousand, seven hundred forty".