818345227400 has 96 divisors (see below), whose sum is σ = 1913165719200. Its totient is φ = 325531852800.

The previous prime is 818345227397. The next prime is 818345227409. The reversal of 818345227400 is 4722543818.

It is a super-2 number, since 2×818345227400² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (818345227409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59452919 + ... + 59466681.

It is an arithmetic number, because the mean of its divisors is an integer number (19928809575).

Almost surely, 2^818345227400 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 818345227400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (956582859600).

818345227400 is an abundant number, since it is smaller than the sum of its proper divisors (1094820491800).

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

818345227400 is a wasteful number, since it uses less digits than its factorization.

818345227400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15399 (or 15390 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 44.

The spelling of 818345227400 in words is "eight hundred eighteen billion, three hundred forty-five million, two hundred twenty-seven thousand, four hundred".