80865216 has 140 divisors (see below), whose sum is σ = 252633480. Its totient is φ = 25505280.

The previous prime is 80865203. The next prime is 80865221. The reversal of 80865216 is 61256808.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 98086 + ... + 98906.

Almost surely, 2^80865216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80865216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126316740).

80865216 is an abundant number, since it is smaller than the sum of its proper divisors (171768264).

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

80865216 is a wasteful number, since it uses less digits than its factorization.

80865216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80865216 is about 8992.5088823976. The cubic root of 80865216 is about 432.4347475259.

The spelling of 80865216 in words is "eighty million, eight hundred sixty-five thousand, two hundred sixteen".