858391964 has 6 divisors (see below), whose sum is σ = 1502185944. Its totient is φ = 429195980.

The previous prime is 858391927. The next prime is 858391969. The reversal of 858391964 is 469193858.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858391969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107298992 + ... + 107298999.

It is an arithmetic number, because the mean of its divisors is an integer number (250364324).

Almost surely, 2^858391964 is an apocalyptic number.

It is an amenable number.

858391964 is a deficient number, since it is larger than the sum of its proper divisors (643793980).

858391964 is a wasteful number, since it uses less digits than its factorization.

858391964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214597995 (or 214597993 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 53.

The square root of 858391964 is about 29298.3269829525. The cubic root of 858391964 is about 950.3754615618.

The spelling of 858391964 in words is "eight hundred fifty-eight million, three hundred ninety-one thousand, nine hundred sixty-four".