818274450 has 192 divisors, whose sum is σ = 2500411392. Its totient is φ = 172972800.

The previous prime is 818274421. The next prime is 818274451. The reversal of 818274450 is 54472818.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 818274399 and 818274408.

It is not an unprimeable number, because it can be changed into a prime (818274451) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 748104 + ... + 749196.

It is an arithmetic number, because the mean of its divisors is an integer number (13022976).

Almost surely, 2^818274450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 818274450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250205696).

818274450 is an abundant number, since it is smaller than the sum of its proper divisors (1682136942).

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

818274450 is a wasteful number, since it uses less digits than its factorization.

818274450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169 (or 1164 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 818274450 is about 28605.4968493819. The cubic root of 818274450 is about 935.3331574157. Note that the first 3 decimals are identical.

The spelling of 818274450 in words is "eight hundred eighteen million, two hundred seventy-four thousand, four hundred fifty".