8281404040 has 128 divisors (see below), whose sum is σ = 22978690560. Its totient is φ = 2615721984.

The previous prime is 8281404037. The next prime is 8281404059. The reversal of 8281404040 is 404041828.

It is a junction number, because it is equal to n+sod(n) for n = 8281403993 and 8281404011.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2098309 + ... + 2102251.

It is an arithmetic number, because the mean of its divisors is an integer number (179521020).

Almost surely, 2^8281404040 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 8281404040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11489345280).

8281404040 is an abundant number, since it is smaller than the sum of its proper divisors (14697286520).

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

8281404040 is a wasteful number, since it uses less digits than its factorization.

8281404040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4551 (or 4547 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 8281404040 is about 91002.2199729215. The cubic root of 8281404040 is about 2023.1806279185.

Adding to 8281404040 its reverse (404041828), we get a palindrome (8685445868).

The spelling of 8281404040 in words is "eight billion, two hundred eighty-one million, four hundred four thousand, forty".