80218440 has 96 divisors (see below), whose sum is σ = 261817920. Its totient is φ = 21300864.

The previous prime is 80218433. The next prime is 80218447. The reversal of 80218440 is 4481208.

80218440 is a `hidden beast` number, since 8 + 0 + 218 + 440 = 666.

It is an interprime number because it is at equal distance from previous prime (80218433) and next prime (80218447).

It is not an unprimeable number, because it can be changed into a prime (80218447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 159229 + ... + 159731.

It is an arithmetic number, because the mean of its divisors is an integer number (2727270).

Almost surely, 2^80218440 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 80218440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130908960).

80218440 is an abundant number, since it is smaller than the sum of its proper divisors (181599480).

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

80218440 is a wasteful number, since it uses less digits than its factorization.

80218440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 956 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 80218440 is about 8956.4747529371. The cubic root of 80218440 is about 431.2787605268.

Adding to 80218440 its reverse (4481208), we get a palindrome (84699648).

It can be divided in two parts, 8021 and 8440, that added together give a palindrome (16461).

The spelling of 80218440 in words is "eighty million, two hundred eighteen thousand, four hundred forty".