161085028 has 12 divisors (see below), whose sum is σ = 303583420. Its totient is φ = 74346912.

The previous prime is 161085019. The next prime is 161085091. The reversal of 161085028 is 820580161.

It can be written as a sum of positive squares in 2 ways, for example, as 104203264 + 56881764 = 10208^2 + 7542^2 .

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, 1548843 + ... + 1548946.

Almost surely, 2^161085028 is an apocalyptic number.

It is an amenable number.

161085028 is a deficient number, since it is larger than the sum of its proper divisors (142498392).

161085028 is a wasteful number, since it uses less digits than its factorization.

161085028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097806 (or 3097804 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 161085028 is about 12691.9276707677. The cubic root of 161085028 is about 544.1079343577.

The spelling of 161085028 in words is "one hundred sixty-one million, eighty-five thousand, twenty-eight".