161884044 has 54 divisors (see below), whose sum is σ = 476021364. Its totient is φ = 46252080.

The previous prime is 161883941. The next prime is 161884049. The reversal of 161884044 is 440488161.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (161884049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 44122 + ... + 47649.

Almost surely, 2^161884044 is an apocalyptic number.

161884044 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161884044 is an abundant number, since it is smaller than the sum of its proper divisors (314137320).

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

161884044 is a wasteful number, since it uses less digits than its factorization.

161884044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91795 (or 91783 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 161884044 is about 12723.3660640571. The cubic root of 161884044 is about 545.0060813507.

The spelling of 161884044 in words is "one hundred sixty-one million, eight hundred eighty-four thousand, forty-four".