863889394 has 16 divisors (see below), whose sum is σ = 1340586648. Its totient is φ = 417197952.

The previous prime is 863889353. The next prime is 863889401. The reversal of 863889394 is 493988368.

It can be written as a sum of positive squares in 4 ways, for example, as 845937225 + 17952169 = 29085^2 + 4237^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32469 + ... + 52744.

Almost surely, 2^863889394 is an apocalyptic number.

863889394 is a deficient number, since it is larger than the sum of its proper divisors (476697254).

863889394 is a wasteful number, since it uses less digits than its factorization.

863889394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85389.

The product of its digits is 8957952, while the sum is 58.

The square root of 863889394 is about 29391.9954069131. The cubic root of 863889394 is about 952.3999868352.

The spelling of 863889394 in words is "eight hundred sixty-three million, eight hundred eighty-nine thousand, three hundred ninety-four".