16881489 has 12 divisors (see below), whose sum is σ = 24432772. Its totient is φ = 11232000.

The previous prime is 16881461. The next prime is 16881511. The reversal of 16881489 is 98418861.

16881489 is a `hidden beast` number, since 168 + 8 + 1 + 489 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 11614464 = 2295^2 + 3408^2 .

It is not a de Polignac number, because 16881489 - 2¹¹ = 16879441 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16881419) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3849 + ... + 6969.

Almost surely, 2^16881489 is an apocalyptic number.

It is an amenable number.

16881489 is a deficient number, since it is larger than the sum of its proper divisors (7551283).

16881489 is a wasteful number, since it uses less digits than its factorization.

16881489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3728 (or 3725 counting only the distinct ones).

The product of its digits is 110592, while the sum is 45.

The square root of 16881489 is about 4108.7089213036. The cubic root of 16881489 is about 256.5292649258.

The spelling of 16881489 in words is "sixteen million, eight hundred eighty-one thousand, four hundred eighty-nine".