8447040 has 168 divisors, whose sum is σ = 33284160. Its totient is φ = 1926144.

The previous prime is 8447029. The next prime is 8447041. The reversal of 8447040 is 407448.

It is a tau number, because it is divible by the number of its divisors (168).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8446995 and 8447013.

It is not an unprimeable number, because it can be changed into a prime (8447041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19951 + ... + 20369.

It is an arithmetic number, because the mean of its divisors is an integer number (198120).

Almost surely, 2^8447040 is an apocalyptic number.

8447040 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 8447040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16642080).

8447040 is an abundant number, since it is smaller than the sum of its proper divisors (24837120).

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

8447040 is a wasteful number, since it uses less digits than its factorization.

8447040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 8447040 is about 2906.3791906769. The cubic root of 8447040 is about 203.6580198830.

The spelling of 8447040 in words is "eight million, four hundred forty-seven thousand, forty".