816489912 has 32 divisors (see below), whose sum is σ = 2332828800. Its totient is φ = 233282784.

The previous prime is 816489911. The next prime is 816489917. The reversal of 816489912 is 219984618.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (816489911) 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, 2429862 + ... + 2430197.

It is an arithmetic number, because the mean of its divisors is an integer number (72900900).

Almost surely, 2^816489912 is an apocalyptic number.

It is an amenable number.

816489912 is an abundant number, since it is smaller than the sum of its proper divisors (1516338888).

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

816489912 is a wasteful number, since it uses less digits than its factorization.

816489912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860075 (or 4860071 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 816489912 is about 28574.2876026682. The cubic root of 816489912 is about 934.6527205050.

The spelling of 816489912 in words is "eight hundred sixteen million, four hundred eighty-nine thousand, nine hundred twelve".