818239488 has 96 divisors (see below), whose sum is σ = 2379948480. Its totient is φ = 247930880.

The previous prime is 818239483. The next prime is 818239489. The reversal of 818239488 is 884932818.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-5 number, since 5×818239488⁵ (a number of 46 digits) contains 55555 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 818239488.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818239483) 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, 61531 + ... + 73637.

It is an arithmetic number, because the mean of its divisors is an integer number (24791130).

Almost surely, 2^818239488 is an apocalyptic number.

818239488 is a gapful number since it is divisible by the number (88) 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 818239488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1189974240).

818239488 is an abundant number, since it is smaller than the sum of its proper divisors (1561708992).

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

818239488 is a wasteful number, since it uses less digits than its factorization.

818239488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12143 (or 12123 counting only the distinct ones).

The product of its digits is 884736, while the sum is 51.

The square root of 818239488 is about 28604.8857365311. The cubic root of 818239488 is about 935.3198360565.

The spelling of 818239488 in words is "eight hundred eighteen million, two hundred thirty-nine thousand, four hundred eighty-eight".