818561324 has 24 divisors (see below), whose sum is σ = 1689934848. Its totient is φ = 339495120.

The previous prime is 818561299. The next prime is 818561327. The reversal of 818561324 is 423165818.

It is a super-2 number, since 2×818561324² = 1340085282297265952, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (818561327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 470654 + ... + 472389.

It is an arithmetic number, because the mean of its divisors is an integer number (70413952).

Almost surely, 2^818561324 is an apocalyptic number.

It is an amenable number.

818561324 is an abundant number, since it is smaller than the sum of its proper divisors (871373524).

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

818561324 is a wasteful number, since it uses less digits than its factorization.

818561324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 943085 (or 943083 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 818561324 is about 28610.5107259552. The cubic root of 818561324 is about 935.4424489514.

The spelling of 818561324 in words is "eight hundred eighteen million, five hundred sixty-one thousand, three hundred twenty-four".