8423540 has 12 divisors (see below), whose sum is σ = 17689476. Its totient is φ = 3369408.

The previous prime is 8423507. The next prime is 8423549. The reversal of 8423540 is 453248.

8423540 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2910436 + 5513104 = 1706^2 + 2348^2 .

It is a super-2 number, since 2×8423540² = 141912052263200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8423549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210569 + ... + 210608.

It is an arithmetic number, because the mean of its divisors is an integer number (1474123).

Almost surely, 2^8423540 is an apocalyptic number.

It is an amenable number.

8423540 is an abundant number, since it is smaller than the sum of its proper divisors (9265936).

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

8423540 is a wasteful number, since it uses less digits than its factorization.

8423540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421186 (or 421184 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8423540 is about 2902.3335438919. Note that the first 3 decimals coincide. The cubic root of 8423540 is about 203.4689829112.

Adding to 8423540 its reverse (453248), we get a palindrome (8876788).

The spelling of 8423540 in words is "eight million, four hundred twenty-three thousand, five hundred forty".