8743420 has 72 divisors (see below), whose sum is σ = 22274784. Its totient is φ = 2823552.

The previous prime is 8743417. The next prime is 8743421. The reversal of 8743420 is 243478.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8743421) 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 23 ways as a sum of consecutive naturals, for example, 50454 + ... + 50626.

It is an arithmetic number, because the mean of its divisors is an integer number (309372).

Almost surely, 2^8743420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8743420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11137392).

8743420 is an abundant number, since it is smaller than the sum of its proper divisors (13531364).

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

8743420 is a wasteful number, since it uses less digits than its factorization.

8743420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 8743420 is about 2956.9274593740. The cubic root of 8743420 is about 206.0125985948.

Adding to 8743420 its reverse (243478), we get a palindrome (8986898).

The spelling of 8743420 in words is "eight million, seven hundred forty-three thousand, four hundred twenty".