818489930 has 8 divisors (see below), whose sum is σ = 1473281892. Its totient is φ = 327395968.

The previous prime is 818489873. The next prime is 818489953. The reversal of 818489930 is 39984818.

It can be written as a sum of positive squares in 2 ways, for example, as 738154561 + 80335369 = 27169^2 + 8963^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×818489930² = 1339851531022809800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40924487 + ... + 40924506.

Almost surely, 2^818489930 is an apocalyptic number.

818489930 is a deficient number, since it is larger than the sum of its proper divisors (654791962).

818489930 is a wasteful number, since it uses less digits than its factorization.

818489930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81849000.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 818489930 is about 28609.2630104307. The cubic root of 818489930 is about 935.4152520805.

The spelling of 818489930 in words is "eight hundred eighteen million, four hundred eighty-nine thousand, nine hundred thirty".