818255040 has 112 divisors (see below), whose sum is σ = 2661452640. Its totient is φ = 212869120.

The previous prime is 818255023. The next prime is 818255047. The reversal of 818255040 is 40552818.

It is a junction number, because it is equal to n+sod(n) for n = 818254992 and 818255010.

It is not an unprimeable number, because it can be changed into a prime (818255047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28966 + ... + 49754.

It is an arithmetic number, because the mean of its divisors is an integer number (23762970).

Almost surely, 2^818255040 is an apocalyptic number.

818255040 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 818255040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1330726320).

818255040 is an abundant number, since it is smaller than the sum of its proper divisors (1843197600).

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

818255040 is a wasteful number, since it uses less digits than its factorization.

818255040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20850 (or 20840 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

The square root of 818255040 is about 28605.1575769126. The cubic root of 818255040 is about 935.3257617878.

The spelling of 818255040 in words is "eight hundred eighteen million, two hundred fifty-five thousand, forty".