818421760 has 224 divisors, whose sum is σ = 2229398640. Its totient is φ = 286261248.

The previous prime is 818421739. The next prime is 818421767. The reversal of 818421760 is 67124818.

It can be written as a sum of positive squares in 8 ways, for example, as 296390656 + 522031104 = 17216^2 + 22848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818421767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15441894 + ... + 15441946.

Almost surely, 2^818421760 is an apocalyptic number.

818421760 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 818421760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1114699320).

818421760 is an abundant number, since it is smaller than the sum of its proper divisors (1410976880).

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

818421760 is a wasteful number, since it uses less digits than its factorization.

818421760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 818421760 is about 28608.0715882773. The cubic root of 818421760 is about 935.3892818859.

The spelling of 818421760 in words is "eight hundred eighteen million, four hundred twenty-one thousand, seven hundred sixty".