818872930 has 16 divisors (see below), whose sum is σ = 1478351160. Its totient is φ = 326575872.

The previous prime is 818872921. The next prime is 818872939. The reversal of 818872930 is 39278818.

It is an interprime number because it is at equal distance from previous prime (818872921) and next prime (818872939).

It can be written as a sum of positive squares in 4 ways, for example, as 271359729 + 547513201 = 16473^2 + 23399^2 .

It is not an unprimeable number, because it can be changed into a prime (818872939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118125 + ... + 124864.

Almost surely, 2^818872930 is an apocalyptic number.

818872930 is a deficient number, since it is larger than the sum of its proper divisors (659478230).

818872930 is a wasteful number, since it uses less digits than its factorization.

818872930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243333.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 818872930 is about 28615.9558638184. The cubic root of 818872930 is about 935.5611338079.

It can be divided in two parts, 8188 and 72930, that added together give a palindrome (81118).

The spelling of 818872930 in words is "eight hundred eighteen million, eight hundred seventy-two thousand, nine hundred thirty".