8423940 has 96 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 1860480.

The previous prime is 8423929. The next prime is 8423953. The reversal of 8423940 is 493248.

It is a happy number.

8423940 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8423898 and 8423907.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12697 + ... + 13343.

It is an arithmetic number, because the mean of its divisors is an integer number (290304).

Almost surely, 2^8423940 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 8423940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13934592).

8423940 is an abundant number, since it is smaller than the sum of its proper divisors (19445244).

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

8423940 is a wasteful number, since it uses less digits than its factorization.

8423940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 8423940 is about 2902.4024531412. The cubic root of 8423940 is about 203.4722035011.

The spelling of 8423940 in words is "eight million, four hundred twenty-three thousand, nine hundred forty".