161823388 has 6 divisors (see below), whose sum is σ = 283190936. Its totient is φ = 80911692.

The previous prime is 161823353. The next prime is 161823401. The reversal of 161823388 is 883328161.

161823388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 161823388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20227920 + ... + 20227927.

Almost surely, 2^161823388 is an apocalyptic number.

It is an amenable number.

161823388 is a deficient number, since it is larger than the sum of its proper divisors (121367548).

161823388 is a wasteful number, since it uses less digits than its factorization.

161823388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40455851 (or 40455849 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 161823388 is about 12720.9821947835. The cubic root of 161823388 is about 544.9380037775.

The spelling of 161823388 in words is "one hundred sixty-one million, eight hundred twenty-three thousand, three hundred eighty-eight".