161028423 has 12 divisors (see below), whose sum is σ = 232795368. Its totient is φ = 107260560.

The previous prime is 161028409. The next prime is 161028433. The reversal of 161028423 is 324820161.

161028423 is a `hidden beast` number, since 1 + 610 + 2 + 8 + 42 + 3 = 666.

It is not a de Polignac number, because 161028423 - 2²⁶ = 93919559 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161028433) 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, 4488 + ... + 18498.

It is an arithmetic number, because the mean of its divisors is an integer number (19399614).

Almost surely, 2^161028423 is an apocalyptic number.

161028423 is a deficient number, since it is larger than the sum of its proper divisors (71766945).

161028423 is a wasteful number, since it uses less digits than its factorization.

161028423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15294 (or 15291 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161028423 is about 12689.6975141254. The cubic root of 161028423 is about 544.0441940289.

Adding to 161028423 its reverse (324820161), we get a palindrome (485848584).

The spelling of 161028423 in words is "one hundred sixty-one million, twenty-eight thousand, four hundred twenty-three".