16861116 has 24 divisors (see below), whose sum is σ = 41053824. Its totient is φ = 5375920.

The previous prime is 16861111. The next prime is 16861129. The reversal of 16861116 is 61116861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16861111) 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, 30270 + ... + 30821.

It is an arithmetic number, because the mean of its divisors is an integer number (1710576).

Almost surely, 2^16861116 is an apocalyptic number.

It is an amenable number.

16861116 is an abundant number, since it is smaller than the sum of its proper divisors (24192708).

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

16861116 is a wasteful number, since it uses less digits than its factorization.

16861116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61121 (or 61119 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 16861116 is about 4106.2289268866. The cubic root of 16861116 is about 256.4260280900.

Adding to 16861116 its reverse (61116861), we get a palindrome (77977977).

The spelling of 16861116 in words is "sixteen million, eight hundred sixty-one thousand, one hundred sixteen".