4321680 has 80 divisors (see below), whose sum is σ = 14624064. Its totient is φ = 1047040.

The previous prime is 4321663. The next prime is 4321703. The reversal of 4321680 is 861234.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 4321680.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822 + ... + 3458.

Almost surely, 2^4321680 is an apocalyptic number.

4321680 is a gapful number since it is divisible by the number (40) 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 4321680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7312032).

4321680 is an abundant number, since it is smaller than the sum of its proper divisors (10302384).

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

4321680 is a wasteful number, since it uses less digits than its factorization.

4321680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1658 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 4321680 is about 2078.8650749868. The cubic root of 4321680 is about 162.8861663965.

It can be divided in two parts, 432 and 1680, that added together give a palindrome (2112).

The spelling of 4321680 in words is "four million, three hundred twenty-one thousand, six hundred eighty".