8287440 has 80 divisors (see below), whose sum is σ = 29367168. Its totient is φ = 1893888.

The previous prime is 8287427. The next prime is 8287469. The reversal of 8287440 is 447828.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 787 + ... + 4146.

Almost surely, 2^8287440 is an apocalyptic number.

8287440 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 8287440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14683584).

8287440 is an abundant number, since it is smaller than the sum of its proper divisors (21079728).

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

8287440 is a wasteful number, since it uses less digits than its factorization.

8287440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956 (or 4950 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 8287440 is about 2878.7914130760. The cubic root of 8287440 is about 202.3672045058.

The spelling of 8287440 in words is "eight million, two hundred eighty-seven thousand, four hundred forty".