165402244 has 18 divisors (see below), whose sum is σ = 336712110. Its totient is φ = 70886592.

The previous prime is 165402217. The next prime is 165402253. The reversal of 165402244 is 442204561.

It can be written as a sum of positive squares in only one way, i.e., 130827844 + 34574400 = 11438^2 + 5880^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 421749 + ... + 422140.

Almost surely, 2^165402244 is an apocalyptic number.

165402244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

165402244 is an abundant number, since it is smaller than the sum of its proper divisors (171309866).

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

165402244 is a wasteful number, since it uses less digits than its factorization.

165402244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843907 (or 843898 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 165402244 is about 12860.8803742201. The cubic root of 165402244 is about 548.9259966851.

The spelling of 165402244 in words is "one hundred sixty-five million, four hundred two thousand, two hundred forty-four".