8640234 has 12 divisors (see below), whose sum is σ = 18720546. Its totient is φ = 2880072.

The previous prime is 8640221. The next prime is 8640241. The reversal of 8640234 is 4320468.

It can be written as a sum of positive squares in only one way, i.e., 7306209 + 1334025 = 2703^2 + 1155^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8640198 and 8640207.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 239989 + ... + 240024.

Almost surely, 2^8640234 is an apocalyptic number.

8640234 is an abundant number, since it is smaller than the sum of its proper divisors (10080312).

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

8640234 is a wasteful number, since it uses less digits than its factorization.

8640234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480021 (or 480018 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 8640234 is about 2939.4274952786. The cubic root of 8640234 is about 205.1989660584.

It can be divided in two parts, 86402 and 34, that added together give a square (86436 = 294²).

The spelling of 8640234 in words is "eight million, six hundred forty thousand, two hundred thirty-four".