8463440 has 40 divisors (see below), whose sum is σ = 19983840. Its totient is φ = 3332736.

The previous prime is 8463419. The next prime is 8463457. The reversal of 8463440 is 443648.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4571 + ... + 6149.

It is an arithmetic number, because the mean of its divisors is an integer number (499596).

Almost surely, 2^8463440 is an apocalyptic number.

8463440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8463440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9991920).

8463440 is an abundant number, since it is smaller than the sum of its proper divisors (11520400).

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

8463440 is a wasteful number, since it uses less digits than its factorization.

8463440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659 (or 1653 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 8463440 is about 2909.1992025298. The cubic root of 8463440 is about 203.7897359363.

The spelling of 8463440 in words is "eight million, four hundred sixty-three thousand, four hundred forty".