165403128 has 48 divisors (see below), whose sum is σ = 454524840. Its totient is φ = 50121280.

The previous prime is 165403127. The next prime is 165403171. The reversal of 165403128 is 821304561.

It is a super-3 number, since 3×165403128³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165403095 and 165403104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165403127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25575 + ... + 31382.

Almost surely, 2^165403128 is an apocalyptic number.

It is an amenable number.

165403128 is an abundant number, since it is smaller than the sum of its proper divisors (289121712).

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

165403128 is a wasteful number, since it uses less digits than its factorization.

165403128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56988 (or 56973 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 165403128 is about 12860.9147419614. The cubic root of 165403128 is about 548.9269746035.

Adding to 165403128 its reverse (821304561), we get a palindrome (986707689).

The spelling of 165403128 in words is "one hundred sixty-five million, four hundred three thousand, one hundred twenty-eight".