4320624 has 120 divisors (see below), whose sum is σ = 14249088. Its totient is φ = 1115520.

The previous prime is 4320607. The next prime is 4320637. The reversal of 4320624 is 4260234.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 4320624.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 25789 + ... + 25955.

Almost surely, 2^4320624 is an apocalyptic number.

4320624 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4320624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7124544).

4320624 is an abundant number, since it is smaller than the sum of its proper divisors (9928464).

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

4320624 is a wasteful number, since it uses less digits than its factorization.

4320624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 4320624 is about 2078.6110747324. The cubic root of 4320624 is about 162.8728982691.

Adding to 4320624 its reverse (4260234), we get a palindrome (8580858).

The spelling of 4320624 in words is "four million, three hundred twenty thousand, six hundred twenty-four".