16863864 has 32 divisors (see below), whose sum is σ = 44640720. Its totient is φ = 5290496.

The previous prime is 16863863. The next prime is 16863901. The reversal of 16863864 is 46836861.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16863863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20259 + ... + 21074.

Almost surely, 2^16863864 is an apocalyptic number.

It is an amenable number.

16863864 is an abundant number, since it is smaller than the sum of its proper divisors (27776856).

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

16863864 is a wasteful number, since it uses less digits than its factorization.

16863864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41359 (or 41355 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 16863864 is about 4106.5635268433. The cubic root of 16863864 is about 256.4399579795.

The spelling of 16863864 in words is "sixteen million, eight hundred sixty-three thousand, eight hundred sixty-four".