818400180 has 192 divisors, whose sum is σ = 2559691008. Its totient is φ = 194088960.

The previous prime is 818400133. The next prime is 818400181. The reversal of 818400180 is 81004818.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818400181) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5020779 + ... + 5020941.

It is an arithmetic number, because the mean of its divisors is an integer number (13331724).

Almost surely, 2^818400180 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 818400180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1279845504).

818400180 is an abundant number, since it is smaller than the sum of its proper divisors (1741290828).

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

818400180 is a wasteful number, since it uses less digits than its factorization.

818400180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 386 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 30.

The square root of 818400180 is about 28607.6944195089. The cubic root of 818400180 is about 935.3810604207.

Adding to 818400180 its reverse (81004818), we get a palindrome (899404998).

The spelling of 818400180 in words is "eight hundred eighteen million, four hundred thousand, one hundred eighty".