161623338 has 16 divisors (see below), whose sum is σ = 323385696. Its totient is φ = 53851280.

The previous prime is 161623333. The next prime is 161623339. The reversal of 161623338 is 833326161.

161623338 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161623338² = 52244206772524488, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 161623299 and 161623308.

It is not an unprimeable number, because it can be changed into a prime (161623333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15145 + ... + 23507.

It is an arithmetic number, because the mean of its divisors is an integer number (20211606).

Almost surely, 2^161623338 is an apocalyptic number.

161623338 is an abundant number, since it is smaller than the sum of its proper divisors (161762358).

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

161623338 is a wasteful number, since it uses less digits than its factorization.

161623338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11589.

The product of its digits is 15552, while the sum is 33.

The square root of 161623338 is about 12713.1167696989. The cubic root of 161623338 is about 544.7133559848.

Adding to 161623338 its reverse (833326161), we get a palindrome (994949499).

The spelling of 161623338 in words is "one hundred sixty-one million, six hundred twenty-three thousand, three hundred thirty-eight".