864191336 has 8 divisors (see below), whose sum is σ = 1620358770. Its totient is φ = 432095664.

The previous prime is 864191323. The next prime is 864191381. The reversal of 864191336 is 633191468.

It can be written as a sum of positive squares in only one way, i.e., 644855236 + 219336100 = 25394^2 + 14810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 864191293 and 864191302.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54011951 + ... + 54011966.

Almost surely, 2^864191336 is an apocalyptic number.

It is an amenable number.

864191336 is a deficient number, since it is larger than the sum of its proper divisors (756167434).

864191336 is a wasteful number, since it uses less digits than its factorization.

864191336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108023923 (or 108023919 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 864191336 is about 29397.1314246816. The cubic root of 864191336 is about 952.5109331601.

The spelling of 864191336 in words is "eight hundred sixty-four million, one hundred ninety-one thousand, three hundred thirty-six".