817938312 has 16 divisors (see below), whose sum is σ = 2044845840. Its totient is φ = 272646096.

The previous prime is 817938311. The next prime is 817938313. The reversal of 817938312 is 213839718.

It is an interprime number because it is at equal distance from previous prime (817938311) and next prime (817938313).

It is not an unprimeable number, because it can be changed into a prime (817938311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17040358 + ... + 17040405.

It is an arithmetic number, because the mean of its divisors is an integer number (127802865).

Almost surely, 2^817938312 is an apocalyptic number.

It is an amenable number.

817938312 is an abundant number, since it is smaller than the sum of its proper divisors (1226907528).

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

817938312 is a wasteful number, since it uses less digits than its factorization.

817938312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34080772 (or 34080768 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 817938312 is about 28599.6208366475. The cubic root of 817938312 is about 935.2050650715.

The spelling of 817938312 in words is "eight hundred seventeen million, nine hundred thirty-eight thousand, three hundred twelve".