161244028 has 48 divisors (see below), whose sum is σ = 317850624. Its totient is φ = 70943040.

The previous prime is 161243993. The next prime is 161244029. The reversal of 161244028 is 820442161.

It is a junction number, because it is equal to n+sod(n) for n = 161243987 and 161244005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161244029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 212626 + ... + 213382.

It is an arithmetic number, because the mean of its divisors is an integer number (6621888).

Almost surely, 2^161244028 is an apocalyptic number.

It is an amenable number.

161244028 is a deficient number, since it is larger than the sum of its proper divisors (156606596).

161244028 is a wasteful number, since it uses less digits than its factorization.

161244028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922 (or 920 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 161244028 is about 12698.1899497527. The cubic root of 161244028 is about 544.2868972193.

Adding to 161244028 its reverse (820442161), we get a palindrome (981686189).

The spelling of 161244028 in words is "one hundred sixty-one million, two hundred forty-four thousand, twenty-eight".