161544828 has 24 divisors (see below), whose sum is σ = 384959232. Its totient is φ = 52702384.

The previous prime is 161544811. The next prime is 161544833. The reversal of 161544828 is 828445161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142650 + ... + 143777.

It is an arithmetic number, because the mean of its divisors is an integer number (16039968).

Almost surely, 2^161544828 is an apocalyptic number.

It is an amenable number.

161544828 is an abundant number, since it is smaller than the sum of its proper divisors (223414404).

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

161544828 is a wasteful number, since it uses less digits than its factorization.

161544828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286481 (or 286479 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 161544828 is about 12710.0286388348. The cubic root of 161544828 is about 544.6251418845.

Adding to 161544828 its reverse (828445161), we get a palindrome (989989989).

The spelling of 161544828 in words is "one hundred sixty-one million, five hundred forty-four thousand, eight hundred twenty-eight".