8957440 has 40 divisors (see below), whose sum is σ = 21483000. Its totient is φ = 3581952.

The previous prime is 8957413. The next prime is 8957447. The reversal of 8957440 is 447598.

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

It is a self number, because there is not a number n which added to its sum of digits gives 8957440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8957447) 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 3 ways as a sum of consecutive naturals, for example, 811 + ... + 4309.

It is an arithmetic number, because the mean of its divisors is an integer number (537075).

Almost surely, 2^8957440 is an apocalyptic number.

8957440 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 8957440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10741500).

8957440 is an abundant number, since it is smaller than the sum of its proper divisors (12525560).

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

8957440 is an equidigital number, since it uses as much as digits as its factorization.

8957440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3522 (or 3506 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 8957440 is about 2992.8982608836. The cubic root of 8957440 is about 207.6799812599.

The spelling of 8957440 in words is "eight million, nine hundred fifty-seven thousand, four hundred forty".