8947440 has 180 divisors, whose sum is σ = 32662344. Its totient is φ = 2193408.

The previous prime is 8947417. The next prime is 8947441. The reversal of 8947440 is 447498.

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 8947395 and 8947404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8947441) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 208059 + ... + 208101.

Almost surely, 2^8947440 is an apocalyptic number.

8947440 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 8947440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16331172).

8947440 is an abundant number, since it is smaller than the sum of its proper divisors (23714904).

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

8947440 is a wasteful number, since it uses less digits than its factorization.

8947440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 8947440 is about 2991.2271729175. The cubic root of 8947440 is about 207.6026685035.

The spelling of 8947440 in words is "eight million, nine hundred forty-seven thousand, four hundred forty".