16861236 has 48 divisors (see below), whose sum is σ = 45252480. Its totient is φ = 4786560.

The previous prime is 16861223. The next prime is 16861259. The reversal of 16861236 is 63216861.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16861197 and 16861206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14650 + ... + 15758.

It is an arithmetic number, because the mean of its divisors is an integer number (942760).

Almost surely, 2^16861236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16861236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22626240).

16861236 is an abundant number, since it is smaller than the sum of its proper divisors (28391244).

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

16861236 is a wasteful number, since it uses less digits than its factorization.

16861236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1302 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 16861236 is about 4106.2435388077. The cubic root of 16861236 is about 256.4266364138.

The spelling of 16861236 in words is "sixteen million, eight hundred sixty-one thousand, two hundred thirty-six".