161984408 has 16 divisors (see below), whose sum is σ = 305250000. Its totient is φ = 80584416.

The previous prime is 161984371. The next prime is 161984413. The reversal of 161984408 is 804489161.

It is a super-2 number, since 2×161984408² = 52477896870220928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49283 + ... + 52466.

It is an arithmetic number, because the mean of its divisors is an integer number (19078125).

Almost surely, 2^161984408 is an apocalyptic number.

It is an amenable number.

161984408 is a deficient number, since it is larger than the sum of its proper divisors (143265592).

161984408 is a wasteful number, since it uses less digits than its factorization.

161984408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101954 (or 101950 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 161984408 is about 12727.3095350117. The cubic root of 161984408 is about 545.1186880637.

The spelling of 161984408 in words is "one hundred sixty-one million, nine hundred eighty-four thousand, four hundred eight".