80638218 has 36 divisors (see below), whose sum is σ = 178238034. Its totient is φ = 26341200.

The previous prime is 80638211. The next prime is 80638231. The reversal of 80638218 is 81283608.

80638218 is a `hidden beast` number, since 8 + 0 + 638 + 2 + 18 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79977249 + 660969 = 8943^2 + 813^2 .

It is not an unprimeable number, because it can be changed into a prime (80638211) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 297423 + ... + 297693.

Almost surely, 2^80638218 is an apocalyptic number.

80638218 is an abundant number, since it is smaller than the sum of its proper divisors (97599816).

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

80638218 is a wasteful number, since it uses less digits than its factorization.

80638218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 80638218 is about 8979.8785069732. The cubic root of 80638218 is about 432.0297368933.

The spelling of 80638218 in words is "eighty million, six hundred thirty-eight thousand, two hundred eighteen".