16866738 has 32 divisors (see below), whose sum is σ = 42837120. Its totient is φ = 4818960.

The previous prime is 16866727. The next prime is 16866739. The reversal of 16866738 is 83766861.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 16866693 and 16866702.

It is not an unprimeable number, because it can be changed into a prime (16866739) 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 15 ways as a sum of consecutive naturals, for example, 21933 + ... + 22688.

It is an arithmetic number, because the mean of its divisors is an integer number (1338660).

Almost surely, 2^16866738 is an apocalyptic number.

16866738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16866738 is an abundant number, since it is smaller than the sum of its proper divisors (25970382).

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

16866738 is a wasteful number, since it uses less digits than its factorization.

16866738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44639 (or 44633 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 16866738 is about 4106.9134395553. The cubic root of 16866738 is about 256.4545249569.

The spelling of 16866738 in words is "sixteen million, eight hundred sixty-six thousand, seven hundred thirty-eight".