16840989 has 12 divisors (see below), whose sum is σ = 26537472. Its totient is φ = 10206600.

The previous prime is 16840981. The next prime is 16841003. The reversal of 16840989 is 98904861.

16840989 is a `hidden beast` number, since 168 + 409 + 89 = 666.

It is not a de Polignac number, because 16840989 - 2³ = 16840981 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840981) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 84957 + ... + 85154.

It is an arithmetic number, because the mean of its divisors is an integer number (2211456).

Almost surely, 2^16840989 is an apocalyptic number.

It is an amenable number.

16840989 is a deficient number, since it is larger than the sum of its proper divisors (9696483).

16840989 is a wasteful number, since it uses less digits than its factorization.

16840989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170128 (or 170125 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 16840989 is about 4103.7774062442. Note that the first 3 decimals coincide. The cubic root of 16840989 is about 256.3239561272.

The spelling of 16840989 in words is "sixteen million, eight hundred forty thousand, nine hundred eighty-nine".