816582012 has 48 divisors (see below), whose sum is σ = 2019699360. Its totient is φ = 255895552.

The previous prime is 816581989. The next prime is 816582023. The reversal of 816582012 is 210285618.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249088 + ... + 252344.

It is an arithmetic number, because the mean of its divisors is an integer number (42077070).

Almost surely, 2^816582012 is an apocalyptic number.

It is an amenable number.

816582012 is an abundant number, since it is smaller than the sum of its proper divisors (1203117348).

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

816582012 is a wasteful number, since it uses less digits than its factorization.

816582012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4510 (or 4508 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 816582012 is about 28575.8991459586. The cubic root of 816582012 is about 934.6878621023.

The spelling of 816582012 in words is "eight hundred sixteen million, five hundred eighty-two thousand, twelve".