864239827 has 8 divisors (see below), whose sum is σ = 943227072. Its totient is φ = 785322600.

The previous prime is 864239809. The next prime is 864239837. The reversal of 864239827 is 728932468.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864239827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (864239837) 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 in 7 ways as a sum of consecutive naturals, for example, 10228 + ... + 42814.

It is an arithmetic number, because the mean of its divisors is an integer number (117903384).

Almost surely, 2^864239827 is an apocalyptic number.

864239827 is a deficient number, since it is larger than the sum of its proper divisors (78987245).

864239827 is a wasteful number, since it uses less digits than its factorization.

864239827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35009.

The product of its digits is 1161216, while the sum is 49.

The square root of 864239827 is about 29397.9561704551. The cubic root of 864239827 is about 952.5287484061.

The spelling of 864239827 in words is "eight hundred sixty-four million, two hundred thirty-nine thousand, eight hundred twenty-seven".