8440940 has 48 divisors (see below), whose sum is σ = 18933600. Its totient is φ = 3151872.

The previous prime is 8440919. The next prime is 8440961. The reversal of 8440940 is 490448.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8440919) and next prime (8440961).

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, 36746 + ... + 36974.

It is an arithmetic number, because the mean of its divisors is an integer number (394450).

Almost surely, 2^8440940 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 8440940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9466800).

8440940 is an abundant number, since it is smaller than the sum of its proper divisors (10492660).

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

8440940 is a wasteful number, since it uses less digits than its factorization.

8440940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 8440940 is about 2905.3295854343. The cubic root of 8440940 is about 203.6089844384.

The spelling of 8440940 in words is "eight million, four hundred forty thousand, nine hundred forty".