165190420 has 12 divisors (see below), whose sum is σ = 346899924. Its totient is φ = 66076160.

The previous prime is 165190387. The next prime is 165190429. The reversal of 165190420 is 24091561.

It can be written as a sum of positive squares in 2 ways, for example, as 68128516 + 97061904 = 8254^2 + 9852^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165190429) 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, 4129741 + ... + 4129780.

It is an arithmetic number, because the mean of its divisors is an integer number (28908327).

Almost surely, 2^165190420 is an apocalyptic number.

165190420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165190420 is an abundant number, since it is smaller than the sum of its proper divisors (181709504).

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

165190420 is a wasteful number, since it uses less digits than its factorization.

165190420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8259530 (or 8259528 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 165190420 is about 12852.6425298458. The cubic root of 165190420 is about 548.6915674347.

The spelling of 165190420 in words is "one hundred sixty-five million, one hundred ninety thousand, four hundred twenty".