8280040 has 32 divisors (see below), whose sum is σ = 18717480. Its totient is φ = 3296512.

The previous prime is 8280011. The next prime is 8280043. The reversal of 8280040 is 400828.

It can be written as a sum of positive squares in 4 ways, for example, as 3378244 + 4901796 = 1838^2 + 2214^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8279993 and 8280020.

It is not an unprimeable number, because it can be changed into a prime (8280043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12354 + ... + 13006.

Almost surely, 2^8280040 is an apocalyptic number.

It is an amenable number.

8280040 is an abundant number, since it is smaller than the sum of its proper divisors (10437440).

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

8280040 is a wasteful number, since it uses less digits than its factorization.

8280040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 8280040 is about 2877.5058644597. The cubic root of 8280040 is about 202.3069541649.

Adding to 8280040 its reverse (400828), we get a palindrome (8680868).

The spelling of 8280040 in words is "eight million, two hundred eighty thousand, forty".