863391398 has 16 divisors (see below), whose sum is σ = 1322742960. Its totient is φ = 422572896.

The previous prime is 863391383. The next prime is 863391401. The reversal of 863391398 is 893193368.

It is a super-2 number, since 2×863391398² = 1490889412280788808, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5765 + ... + 41952.

It is an arithmetic number, because the mean of its divisors is an integer number (82671435).

Almost surely, 2^863391398 is an apocalyptic number.

863391398 is a deficient number, since it is larger than the sum of its proper divisors (459351562).

863391398 is a wasteful number, since it uses less digits than its factorization.

863391398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47911.

The product of its digits is 839808, while the sum is 50.

The square root of 863391398 is about 29383.5225594210. The cubic root of 863391398 is about 952.2169454441.

The spelling of 863391398 in words is "eight hundred sixty-three million, three hundred ninety-one thousand, three hundred ninety-eight".