863946 has 20 divisors (see below), whose sum is σ = 1936242. Its totient is φ = 287928.

The previous prime is 863921. The next prime is 863959. The reversal of 863946 is 649368.

It can be written as a sum of positive squares in only one way, i.e., 455625 + 408321 = 675^2 + 639^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 863946.

It is an unprimeable number.

863946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 9 ways as a sum of consecutive naturals, for example, 2505 + ... + 2828.

2⁸⁶³⁹⁴⁶ is an apocalyptic number.

863946 is an abundant number, since it is smaller than the sum of its proper divisors (1072296).

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

863946 is a wasteful number, since it uses less digits than its factorization.

863946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5347 (or 5338 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 863946 is about 929.4869552608. The cubic root of 863946 is about 95.2420788254.

The spelling of 863946 in words is "eight hundred sixty-three thousand, nine hundred forty-six".