82220816 has 40 divisors (see below), whose sum is σ = 164465664. Its totient is φ = 39795840.

The previous prime is 82220797. The next prime is 82220821. The reversal of 82220816 is 61802228.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86906 + ... + 87846.

Almost surely, 2^82220816 is an apocalyptic number.

82220816 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

82220816 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

82220816 is a wasteful number, since it uses less digits than its factorization.

82220816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119 (or 1113 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 82220816 is about 9067.5694648566. The cubic root of 82220816 is about 434.8377710115.

The spelling of 82220816 in words is "eighty-two million, two hundred twenty thousand, eight hundred sixteen".