8340440 has 16 divisors (see below), whose sum is σ = 18766080. Its totient is φ = 3336160.

The previous prime is 8340433. The next prime is 8340443. The reversal of 8340440 is 440438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8340443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104216 + ... + 104295.

It is an arithmetic number, because the mean of its divisors is an integer number (1172880).

Almost surely, 2^8340440 is an apocalyptic number.

It is an amenable number.

8340440 is an abundant number, since it is smaller than the sum of its proper divisors (10425640).

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

8340440 is a wasteful number, since it uses less digits than its factorization.

8340440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208522 (or 208518 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 8340440 is about 2887.9819944037. The cubic root of 8340440 is about 202.7976823869.

Adding to 8340440 its reverse (440438), we get a palindrome (8780878).

The spelling of 8340440 in words is "eight million, three hundred forty thousand, four hundred forty".