8785440 has 72 divisors (see below), whose sum is σ = 29985228. Its totient is φ = 2342400.

The previous prime is 8785433. The next prime is 8785453. The reversal of 8785440 is 445878.

8785440 is nontrivially palindromic in base 11.

It can be written as a sum of positive squares in 2 ways, for example, as 8785296 + 144 = 2964^2 + 12^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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 = 8785395 and 8785404.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1611 + ... + 4490.

Almost surely, 2^8785440 is an apocalyptic number.

8785440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8785440 is an abundant number, since it is smaller than the sum of its proper divisors (21199788).

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

8785440 is a wasteful number, since it uses less digits than its factorization.

8785440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6122 (or 6111 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 8785440 is about 2964.0242913984. The cubic root of 8785440 is about 206.3420966111.

The spelling of 8785440 in words is "eight million, seven hundred eighty-five thousand, four hundred forty".