864424989 has 12 divisors (see below), whose sum is σ = 1269777600. Its totient is φ = 566515464.

The previous prime is 864424973. The next prime is 864424991. The reversal of 864424989 is 989424468.

864424989 is a `hidden beast` number, since 86 + 442 + 49 + 89 = 666.

It is not a de Polignac number, because 864424989 - 2⁴ = 864424973 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864424919) 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 11 ways as a sum of consecutive naturals, for example, 813429 + ... + 814490.

It is an arithmetic number, because the mean of its divisors is an integer number (105814800).

Almost surely, 2^864424989 is an apocalyptic number.

It is an amenable number.

864424989 is a deficient number, since it is larger than the sum of its proper divisors (405352611).

864424989 is a wasteful number, since it uses less digits than its factorization.

864424989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627984 (or 1627981 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The square root of 864424989 is about 29401.1052343275. The cubic root of 864424989 is about 952.5967694686.

It can be divided in two parts, 8644 and 24989, that added together give a palindrome (33633).

The spelling of 864424989 in words is "eight hundred sixty-four million, four hundred twenty-four thousand, nine hundred eighty-nine".