161949328 has 10 divisors (see below), whose sum is σ = 313776854. Its totient is φ = 80974656.

The previous prime is 161949313. The next prime is 161949341. The reversal of 161949328 is 823949161.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 129322384 + 32626944 = 11372^2 + 5712^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060901 + ... + 5060932.

Almost surely, 2^161949328 is an apocalyptic number.

It is an amenable number.

161949328 is a deficient number, since it is larger than the sum of its proper divisors (151827526).

161949328 is a wasteful number, since it uses less digits than its factorization.

161949328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10121841 (or 10121835 counting only the distinct ones).

The product of its digits is 93312, while the sum is 43.

The square root of 161949328 is about 12725.9313215183. The cubic root of 161949328 is about 545.0793341851.

The spelling of 161949328 in words is "one hundred sixty-one million, nine hundred forty-nine thousand, three hundred twenty-eight".