863404 has 6 divisors (see below), whose sum is σ = 1510964. Its totient is φ = 431700.

The previous prime is 863393. The next prime is 863479. The reversal of 863404 is 404368.

863404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107922 + ... + 107929.

2⁸⁶³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

863404 is a deficient number, since it is larger than the sum of its proper divisors (647560).

863404 is a wasteful number, since it uses less digits than its factorization.

863404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215855 (or 215853 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 863404 is about 929.1953508278. The cubic root of 863404 is about 95.2221578252. Note that the first 3 decimals are identical.

The spelling of 863404 in words is "eight hundred sixty-three thousand, four hundred four".