863444 has 12 divisors (see below), whose sum is σ = 1532244. Its totient is φ = 425664.

The previous prime is 863393. The next prime is 863479. The reversal of 863444 is 444368.

863444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 315844 + 547600 = 562^2 + 740^2 .

It is a super-2 number, since 2×863444² = 1491071082272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1187 + ... + 1770.

It is an arithmetic number, because the mean of its divisors is an integer number (127687).

2⁸⁶³⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

863444 is a deficient number, since it is larger than the sum of its proper divisors (668800).

863444 is a wasteful number, since it uses less digits than its factorization.

863444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3034 (or 3032 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

The square root of 863444 is about 929.2168745777. The cubic root of 863444 is about 95.2236282946.

The spelling of 863444 in words is "eight hundred sixty-three thousand, four hundred forty-four".