8455240 has 64 divisors (see below), whose sum is σ = 20314800. Its totient is φ = 3161088.

The previous prime is 8455217. The next prime is 8455241. The reversal of 8455240 is 425548.

It can be written as a sum of positive squares in 8 ways, for example, as 7739524 + 715716 = 2782^2 + 846^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8455199 and 8455208.

It is not an unprimeable number, because it can be changed into a prime (8455241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42822 + ... + 43018.

Almost surely, 2^8455240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8455240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10157400).

8455240 is an abundant number, since it is smaller than the sum of its proper divisors (11859560).

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

8455240 is a wasteful number, since it uses less digits than its factorization.

8455240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 8455240 is about 2907.7895384639. The cubic root of 8455240 is about 203.7238991996.

The spelling of 8455240 in words is "eight million, four hundred fifty-five thousand, two hundred forty".