8493440 has 64 divisors (see below), whose sum is σ = 21224160. Its totient is φ = 3244032.

The previous prime is 8493439. The next prime is 8493449. The reversal of 8493440 is 443948.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 8493397 and 8493406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8493449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14432 + ... + 15008.

Almost surely, 2^8493440 is an apocalyptic number.

8493440 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 8493440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10612080).

8493440 is an abundant number, since it is smaller than the sum of its proper divisors (12730720).

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

8493440 is a wasteful number, since it uses less digits than its factorization.

8493440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 8493440 is about 2914.3506995556. The cubic root of 8493440 is about 204.0302402947.

The spelling of 8493440 in words is "eight million, four hundred ninety-three thousand, four hundred forty".