16840889 has 8 divisors (see below), whose sum is σ = 18218760. Its totient is φ = 15474816.

The previous prime is 16840861. The next prime is 16840913. The reversal of 16840889 is 98804861.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 840889 + 16000000 = 917^2 + 4000^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16840889 - 2⁸ = 16840633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16810889) 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 7 ways as a sum of consecutive naturals, for example, 149 + ... + 5805.

It is an arithmetic number, because the mean of its divisors is an integer number (2277345).

Almost surely, 2^16840889 is an apocalyptic number.

It is an amenable number.

16840889 is a deficient number, since it is larger than the sum of its proper divisors (1377871).

16840889 is a wasteful number, since it uses less digits than its factorization.

16840889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899.

The product of its (nonzero) digits is 110592, while the sum is 44.

The square root of 16840889 is about 4103.7652223294. The cubic root of 16840889 is about 256.3234487848.

It can be divided in two parts, 16 and 840889, that multiplied together give a square (13454224 = 3668²).

The spelling of 16840889 in words is "sixteen million, eight hundred forty thousand, eight hundred eighty-nine".