818321120 has 24 divisors (see below), whose sum is σ = 1933284024. Its totient is φ = 327328384.

The previous prime is 818321107. The next prime is 818321123. The reversal of 818321120 is 21123818.

It is a self number, because there is not a number n which added to its sum of digits gives 818321120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818321123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557094 + ... + 2557413.

It is an arithmetic number, because the mean of its divisors is an integer number (80553501).

Almost surely, 2^818321120 is an apocalyptic number.

818321120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

818321120 is an abundant number, since it is smaller than the sum of its proper divisors (1114962904).

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

818321120 is a wasteful number, since it uses less digits than its factorization.

818321120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5114522 (or 5114514 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 818321120 is about 28606.3125900561. The cubic root of 818321120 is about 935.3509392119.

Adding to 818321120 its reverse (21123818), we get a palindrome (839444938).

The spelling of 818321120 in words is "eight hundred eighteen million, three hundred twenty-one thousand, one hundred twenty".