863394404 has 6 divisors (see below), whose sum is σ = 1510940214. Its totient is φ = 431697200.

The previous prime is 863394403. The next prime is 863394421. The reversal of 863394404 is 404493368.

It can be written as a sum of positive squares in only one way, i.e., 841116004 + 22278400 = 29002^2 + 4720^2 .

It is not an unprimeable number, because it can be changed into a prime (863394403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107924297 + ... + 107924304.

It is an arithmetic number, because the mean of its divisors is an integer number (251823369).

Almost surely, 2^863394404 is an apocalyptic number.

It is an amenable number.

863394404 is a deficient number, since it is larger than the sum of its proper divisors (647545810).

863394404 is a wasteful number, since it uses less digits than its factorization.

863394404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215848605 (or 215848603 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 863394404 is about 29383.5737104934. The cubic root of 863394404 is about 952.2180505284.

The spelling of 863394404 in words is "eight hundred sixty-three million, three hundred ninety-four thousand, four hundred four".