8396440 has 64 divisors (see below), whose sum is σ = 20734560. Its totient is φ = 3041280.

The previous prime is 8396429. The next prime is 8396441. The reversal of 8396440 is 446938.

It is a junction number, because it is equal to n+sod(n) for n = 8396396 and 8396405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8396441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34720 + ... + 34960.

Almost surely, 2^8396440 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 8396440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10367280).

8396440 is an abundant number, since it is smaller than the sum of its proper divisors (12338120).

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

8396440 is a wasteful number, since it uses less digits than its factorization.

8396440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 8396440 is about 2897.6611258047. The cubic root of 8396440 is about 203.2505500747.

It can be divided in two parts, 8396 and 440, that added together give a square (8836 = 94²).

The spelling of 8396440 in words is "eight million, three hundred ninety-six thousand, four hundred forty".