82815816 has 16 divisors (see below), whose sum is σ = 207039600. Its totient is φ = 27605264.

The previous prime is 82815809. The next prime is 82815841. The reversal of 82815816 is 61851828.

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, 1725306 + ... + 1725353.

It is an arithmetic number, because the mean of its divisors is an integer number (12939975).

Almost surely, 2^82815816 is an apocalyptic number.

It is an amenable number.

82815816 is an abundant number, since it is smaller than the sum of its proper divisors (124223784).

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

82815816 is a wasteful number, since it uses less digits than its factorization.

82815816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3450668 (or 3450664 counting only the distinct ones).

The product of its digits is 30720, while the sum is 39.

The square root of 82815816 is about 9100.3195548288. The cubic root of 82815816 is about 435.8841680906.

The spelling of 82815816 in words is "eighty-two million, eight hundred fifteen thousand, eight hundred sixteen".