819117330 has 16 divisors (see below), whose sum is σ = 1965881664. Its totient is φ = 218431280.

The previous prime is 819117329. The next prime is 819117337. The reversal of 819117330 is 33711918.

It is a junction number, because it is equal to n+sod(n) for n = 819117291 and 819117300.

It is not an unprimeable number, because it can be changed into a prime (819117337) 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, 13651926 + ... + 13651985.

It is an arithmetic number, because the mean of its divisors is an integer number (122867604).

Almost surely, 2^819117330 is an apocalyptic number.

819117330 is an abundant number, since it is smaller than the sum of its proper divisors (1146764334).

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

819117330 is a wasteful number, since it uses less digits than its factorization.

819117330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27303921.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 819117330 is about 28620.2258900939. The cubic root of 819117330 is about 935.6542000981.

The spelling of 819117330 in words is "eight hundred nineteen million, one hundred seventeen thousand, three hundred thirty".