4320646 has 16 divisors (see below), whose sum is σ = 7105680. Its totient is φ = 1954080.

The previous prime is 4320643. The next prime is 4320689. The reversal of 4320646 is 6460234.

It is a self number, because there is not a number n which added to its sum of digits gives 4320646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4320643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5740 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (444105).

Almost surely, 2^4320646 is an apocalyptic number.

4320646 is a deficient number, since it is larger than the sum of its proper divisors (2785034).

4320646 is a wasteful number, since it uses less digits than its factorization.

4320646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 4320646 is about 2078.6163667209. The cubic root of 4320646 is about 162.8731747104.

It can be divided in two parts, 43 and 20646, that multiplied together give a triangular number (887778 = T₁₃₃₂).

The spelling of 4320646 in words is "four million, three hundred twenty thousand, six hundred forty-six".