16081988 has 12 divisors (see below), whose sum is σ = 30308460. Its totient is φ = 7422432.

The previous prime is 16081937. The next prime is 16082021. The reversal of 16081988 is 88918061.

It can be written as a sum of positive squares in 2 ways, for example, as 3564544 + 12517444 = 1888^2 + 3538^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 154583 + ... + 154686.

It is an arithmetic number, because the mean of its divisors is an integer number (2525705).

Almost surely, 2^16081988 is an apocalyptic number.

It is an amenable number.

16081988 is a deficient number, since it is larger than the sum of its proper divisors (14226472).

16081988 is a wasteful number, since it uses less digits than its factorization.

16081988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309286 (or 309284 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 16081988 is about 4010.2354045617. The cubic root of 16081988 is about 252.4138869179.

The spelling of 16081988 in words is "sixteen million, eighty-one thousand, nine hundred eighty-eight".