80217864 has 80 divisors (see below), whose sum is σ = 227673600. Its totient is φ = 26383968.

The previous prime is 80217847. The next prime is 80217869. The reversal of 80217864 is 46871208.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80217869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50409 + ... + 51975.

It is an arithmetic number, because the mean of its divisors is an integer number (2845920).

Almost surely, 2^80217864 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 80217864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113836800).

80217864 is an abundant number, since it is smaller than the sum of its proper divisors (147455736).

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

80217864 is a wasteful number, since it uses less digits than its factorization.

80217864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1664 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 80217864 is about 8956.4425973709. The cubic root of 80217864 is about 431.2777282738.

The spelling of 80217864 in words is "eighty million, two hundred seventeen thousand, eight hundred sixty-four".