864384858 has 40 divisors (see below), whose sum is σ = 1955704608. Its totient is φ = 285325416.

The previous prime is 864384809. The next prime is 864384887. The reversal of 864384858 is 858483468.

It is a super-2 number, since 2×864384858² = 1494322365479360328, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon 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 19 ways as a sum of consecutive naturals, for example, 9216 + ... + 42587.

Almost surely, 2^864384858 is an apocalyptic number.

864384858 is an abundant number, since it is smaller than the sum of its proper divisors (1091319750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864384858 is a wasteful number, since it uses less digits than its factorization.

864384858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51920 (or 51911 counting only the distinct ones).

The product of its digits is 5898240, while the sum is 54.

The square root of 864384858 is about 29400.4227520626. The cubic root of 864384858 is about 952.5820277798.

The spelling of 864384858 in words is "eight hundred sixty-four million, three hundred eighty-four thousand, eight hundred fifty-eight".